Visual MODFLOW Flex Readme

Known Issues

Build 3.0.507.4, v.2015.1 Release (June 2015)

Additions

  • Added support for MODFLOW-NWT: translate NWT and UPW package, import MODFLOW-NWT model from VMOD Classic.
  • Added options to modify MODPATH results: adjust pathline travel time and time marker frequency
  • During import of wells (pumping or observation) in absolute times, show warnings of any well data that comes before the model start date
  • When define obs. wells, added check for observation dates to be equal to or greater than the modeling objectives start date, and show any offending records
  • Added option to Assign Single or Assign Line for define properties, in the numerical modeling workflow (regular MODFLOW)
  • Added option to "Assign/Single" for inactive cells in numerical workflow
  • Added option to copy boundary condition cell geometry and parameters to other layers in the numerical modeling workflow (regular MODFLOW and MODFLOW-LGR only)
  • Update Export option for Forward/Backward pathlines to use the adjusted pathline length and defined time markers
  • Added units to the Boundary Condition parameter windows
  • Added a new "Object list in view" section to the Flex viewer, to simplify access to settings and options for data objects displayed at a particular workflow step
  • When creating pumping well boundary conditions, added validation for start time for source data to ensure schedule comes on or after the model start date. In addition, for wells that start at different times, added option to automatically insert zero pumping rate until the schedule is defined
  • During Conceptual Model to Numerical Model conversion (regular grids), honour varying boundary condition end times in the resulting numerical model
  • Remove default start date (of today) in the modeling objectives section, for Numerical Model and Conceptual Model
  • Disabled option the change the model start date in the modeling objectives, since this had no impact on the numerical model start time, and only affected the start date for conceptual boundary condition objects; this created confusion for pumping wells/obs. well data that may have been imported with different absolute times
  • Added option to set time periods as active/inactive for numerical boundary conditions (CHD, RIV, GHD, DRN, Specified Flux, LAK), for regular MODFLOW
  • Translate boundary condition time periods "inactive" to appropriate packages (CHD, River, Drain, GHB), by inserting 0 cells for the specific stress periods
  • In the settings for wells data object spreadsheet, added an option to show pumping well schedule or observation times, as relative times.
  • Added option to show water table as a surface (contours/color shading) in 3D Viewer, for MODFLOW-USG runs
  • Added an option to export water table to CSV file, for MODFLOW-USG models
  • Add a legend option to the style settings for water table (surface) for 3D viewer, for MODFLOW-USG and regular MODFLOW
  • When defining active/inactive cells (regular MODFLOW), provide option to have the cell assigments span multiple layers in the model
  • Added an option to change an existing numerical boundary condition from steady state to transient
  • Added new operation for surfaces: Add, Subtract, Multiply, or Divide Z value for a surface, and save as a new surface data object
  • Added option to import observation wells object (heads and concentrations) in relative times from XLS file.
  • Adjusted the import from VMOD Classic option, for wells with point source concentrations, to account for the new pumping wells object with species concentrations
  • Added option to import raw pumping wells in relative times from XLS file.
  • Added option to view/edit observation data (in the regular MODFLOW numerical model) in CSV file, then reload edits back into the model
  • During translation, extend boundary condition stresses to the maximum end time from all boundary conditions, and add "zero" entry for the cell count to the translated package (regular MODFLOW-2000); behaviour similar to VMOD Classic.
  • Added an option to export new pumping wells object to CSV file.
  • Improved error handling and warning message in the event that a MODFLOW run does not converge.
  • Added a mechanism to notify user if they open a project that is created in a newer version of VMOD Flex, when running an older version (will only work for projects in v.2015.1 and future versions of the software)
  • Added a "Finish and Cancel" button to toolbox when doing assign and editing in the numerical model workflow, to improve usability
  • Added warning message when users attempt to edit "old" numerical pumping wells, with suggestion to convert these into "new" pumping wells.
  • Added translate active flag for new well, to basic WEL package
  • Added option to define species concentrations to entire well interval, for new wells object
  • When define boundary condition, using polyline or polygon, added option for attributes to apply defined values/methods for one polygon/polyline to all other polygons/polylines in the selected data object
  • Added option to add one or more new wells with a mouse click, in layer view, for regular MODFLOW models
  • Added option to recognize the active/inactive flag for pumping wells, when import a model from VMOD Classic
  • Added option to set pumping wells as active/inactive, in the new wells interface
  • Added option to see contours/color shading for Fluxes (in X, Y, or Z direction) in 3D viewer (for regular MODFLOW models)
  • Added option to edit conceptual pumping well boundary condition object, after it has been created (for new well model only)
  • Added option for color legends for USG models (properties, heads) to recognize user-defined values from the color settings
  • Added option to save the scene manipulation for USG models in 3D Viewer, after doing save and reload project
  • Added option to create new well boundary condition from within a numerical workflow (using existing well data object from data explorer)
  • Added option to create new well boundary condition in a conceptual workflow, using data object
  • Added a maximum horizon quality of 1000 rows * 1000 columns to improve performance based on "typical" model surfaces and scales; for more details on adjusting this, please contact technical support
  • Added options and toolbar to Data tab and Model explorer to collapse, move, and hide this panel
  • When import model from VMOD Classic, with recharge and EVT time periods set as inactive, set these time periods to have 0 recharge or EVT rate
  • Renamed Logger to Obs.Point in the wells import at the data mapping step
  • Renamed Logger to Obs.Point in the wells settings

Defects Addressed

  • After edit the end time of an existing transient numerical boundary condition, returning and editing the value, it was not saved
  • After importing a model from VMOD Classic, some rewetting options at the Translate/Settings step were not correctly set
  • In certain cases, data objects on Data panel were disabled for 3D viewer inside the MODFLOW-USG workflow
  • Anisotropy calculation for LPF package (regular MODFLOW) used Kx/Ky instead of Ky/Kx (when using the anisotropy as specified option)
  • BCF package translation (for regular MODFLOW) was incorrect for layer type 0 and 2 (transmissivity values not correctly calculated)
  • In the Edit Boundary Condition window, the defined data values were not being saved in the scenario where you add a time schedule to a transient boundary condition
  • BTN translation (for MT3DMS) did not take into account spatially-varying porosity values; it always translated one constant value per layer
  • BTN translation (for MT3DMS) was incorrect for dY calculation (column array (DELC)
  • Could not delete boundary condition items from Model Explorer in a MODFLOW-USG numerical model
  • Incorrect cells rendering of Concentration output in a stand-alone 3D viewer
  • Colors of conceptual property zone objects were not saved in 3D viewer, after save/reload
  • Species concentration numerical attributes did not appear when editing specified flux boundary condition object, with concentration values defined
  • In some cases, species concentration values assigned to specified flux oundary Condition were not translated to SS3 (MT3DMS) package
  • Conceptual to Numerical conversion failed when river boundary condition was selected when the option "Define values at vertices (Linear Interpolation)" was used
  • Conductance value for river object after Conceptual to Numerical Model conversion was incorrect (due to river in inactive cells)
  • Contour lines of surface object were not properly turned off in 3D view
  • Delete menu option for head or concentration obs wells object on Model Explorer did not work
  • Deleting files from conceptual model explorer did not delete all files from the "Arrays" folder on data repository.
  • Deleting grids from the Model Explorer tree, after save and close, and reload, the numerical grids sometimes re-appeared on the model explorer
  • Deleting model run from the Model Explorer in a USG workflow did not delete all related files from the project folder on the hard drive
  • Deleting grid from Model Explorer did not delete GriddedPlugin objects from the .data folder.
  • Deleting numerical models with recharge did not delete .CDF files from data repository.
  • Deleting objects from model explorer did not clean up corresponding files in data repository, and leads to large data repository folders with obsolete files.
  • Deleting runs from model tree did not delete associated files in the data folder
  • Fixed the description of parameter names in the .MPT package
  • Could not close 2D viewer when in pick/edit mode, after doing edit wells, then close project.
  • Addressed errors when opening a complex polygon in 3D viewer
  • Improved error handling when MODFLOW-LGR run fails to converge
  • Addressed errors when using the operation Z=Surface for a map image.
  • Addressed errors when assigning particles, if circle of particles are outside model domain
  • Fixed buttons that were cut off on the Grid at the Translate step in numerical workflow
  • Fixed color legend in 3D viewer when you change background color to anything but black
  • Fixed order of columns for head and concentration obs. data in raw wells spreadsheet
  • Addressed error during Conceptual to Numerical Model conversion (regular grid) for constant head with linear gradient, which used intermediation layer option
  • Addressed errors "Cannot find finite difference grid" after loading old project where a grid was deleted
  • Addressed cleanup of the Grid folder (from project data repository) when an UnStructured grid was deleted from the Model Explorer
  • Addressed problem of MODPATH, ZoneBUDGET and MT3DMS starting in the event that the MODFLOW model failed to converge
  • Fixed issues with .WEL package not matching the .WEL package from a VMOD Classic model (project specific)
  • Added units to the property zone database window in numerical model workflow
  • Addressed problem of incorrect assignment of active cells when creating a new numerical grid with rotation angle exactly 45 degrees
  • Addressed problem of incorrect observation values after copy from excel, save, close and reopen View Spreadsheet
  • Addressed problem of LMG file being included with translation even though this solver was not selected
  • Addressed problem of MODPATH .MPT.ep porosity translation (only when you have spatially-varying porosity values)
  • Multiple forward particle data objects were added to the model explorer, when working with multiple model runs (there should be only one per numerical model)
  • Improved the behavior of assigning new property zone in the numerical model using polygon, where the polygon extends outside of model domain or covers inactive cells
  • Improved the display of the validation screen at the end of data importing, on Windows 8.1
  • Addressed incorrect import of porosity values when importing a model from VMOD Classic
  • Property zones with polygons were not converted correctly to all layers in the model
  • Encounter out-of memory issue when doing concpetual to numercial conversion, with large grids, when consecutive executions (typically more than 10 times)
  • Improved the Project/Save As performance and processing time
  • Improved the Project Save and Project Open time, due to the large project directory size that contained obsolete grids and model runs files
  • SSM (MT3DMS) translation did not include values from constant concentration, after save and reload project
  • Storage values are translated incorrectly for LPF and BCF package (for regular MODFLOW), when values are spatially-varying per layer
  • Surface in 3D or 2D viewer did not allow to turn off color fill and show only contour lines.
  • The check box beside boundary condition group folders in the model explorer (Numerical Model) did not show up after save and reload project
  • The defined name for new Conceptual Models was not being used in the Model Explorer
  • Translation for FHB package was incorrect for Transient mode
  • Translation for WEL package was incorrect for MODFLOW-LGR model, when well is screened over multple layers.
  • Addressed error when viewing water table (project specific)
  • Addressed error when trying to assign Constant Concentration to "Sides" of model domain
  • Improved usability issues when defining Boundary Conditions to the sides (selecting faces/sides)
  • Improved the save/reload states for 3D viewer in a USG numerical model workflow, including selected data objects, property zone selection, and style settings
  • Addressed problem of incorrect constant head attributes converted to numerical model, when using linear interpolation and transient attributes
  • Addressed problem of incorrect constant head cell location after converting from a conceptual model (project specific)
  • Addressed problem of contour interval setting not working for Layer View, when viewing Heads/Concentrations
  • Addressed problem with program not responding during Conceptual to Numerical Model conversion for complex Drain Boundary Condition and multi-layer numerical grid (project specific)
  • Addressed problem of incorrect .WEL translation in certain cases where there are inactive cells
  • Addressed problem of incorrect .WEL translation in the case where a well lies in a child grid that had layer refinement different from parent grid
  • Addressed incorrect Conductance calculation (for River, Gen Head, and Lake) in the case where the units for Conductivity were in a different convention then the project length and time units
  • Improved clean up of project data repository folder, after deleting Grid and Run objects from the model explorer
  • Addressed problem of icon changing in 2D viewer when doing editing.
  • Addressed problem of last selected folder not being saved, when doing consecutive import of data objects using File/Import.
  • Addressed incorrect .LPF package translation (regular MODFLOW) in the scenario where cell re-wetting is active and the model contains inactive cells.
  • Addressed differences in the displayed output times for Heads & Drawdown when comparing the list of times in 3D viewer settings vs. those shown in the Flex viewer, for transient MODFLOW runs

Build 2.1.300.0 (November 2014)

Defects Addressed

  • Long processing time for .CSV editing and re-loading for a General Head Boundary condition group (MODFLOW-2000/2005)
  • After converting conceptual model to numerical model for a General Head  boundary condition assigned to the sides of the model domain, conductance value was being incorrectly calculated as 0 (MODFLOW-2000/2005)
  • Empty attribute data contained in the .csv file of river boundary after converting to a numerical model (MODFLOW-2000/2005) (project-specific)
  • Transport charts not showing up for models that used rotated grid (MODFLOW-2000/2005)
  • Transport charts not showing up when a grid cell contained more than one observation point (XY) (MODFLOW-2000/2005)
  • After refining a MODFLOW-2000/2005 grid, layer elevations were not re-calculated correctly.
  • Error when running animation for conceptual model structure in 3D view.
  • Error in converting the Specified Flux conceptual boundary condition (assigned to the sides of model domain) to numerical model (MODFLOW-2000/2005)
  • Translation error “The given key was not present in the dictionary" for certain projects. (MODFLOW-2000/2005)
  • Data operations, unable to assign the Z values of a polygon from the selected surface
  • Fixed Airport-Transport tutorial solution project files (previously was showing error when loading and also at the Translation step)

Build 2.1.284.0, v.2014.2 Release (July 2014)

Additions

  • Define New Zone Budget zones using Point, Polyline, and Polygon. (Available for MODFLOW-2000 and 2005)
  • Define Wall (HFB) boundary condition. (Available for MODFLOW-2000 and 2005)
  • Improved Options for Defining/Removing Particles
  • Show water table for structured MODFLOW models (plan, XS, 3D view). (Available for MODFLOW-2000 and 2005)
  • Edit numerical property zones or boundary condition attributes in CSV format, and reload back into the numerical model.
  • User-defined color classifications for color rendering (Heads, Conductivity, etc.)
  • Improved coloring of property/recharge zones, when render by ZoneID
  • Export chart data to CSV file
  • Support for rotated numerical grids in numerical workflow (when create new grids, for MODFLOW-2000 and 2005)
  • Improved usability for workflows (better defaults when importing models or generating numerical models from conceptual models)
  • Fix the default zoom level for the 2D (layer view) in the Flex Viewer, when at the View/Grid step and View/BC step (in MODFLOW-2000,2005 workflows)
  • Create the Grid Specification File (GSF) during MODFLOW-USG translation (reserved for future development, including MODPATH-3DU and PEST)
  • Export pathlines to polyline shapefiles
  • Add option to assign new Specified Flux Boundary (assign / polyline, assign/polygon), in the numerical workflow (Available for MODFLOW-2000, 2005)
  • When show unstructured grids in 3D viewer, added option to view the cell geometry as smoothed continuous  surfaces (and not discrete flat top/bottoms)
  • At the Define Boundary Condition step in numerical workflow, added option to create numerical boundary condition from existing data objects (polygon, polyline), (excludes Well objects.) (Available for MODFLOW-2000 and 2005)
  • Improvement in the way time schedules are handled for boundary conditions, to catch boundary conditions that have start/end times that are inconsistent with other boundary conditions.

Defects Addressed

  • Could not create thin layers (less than 0.01 m or ft) at the Create Grid step in Numerical workflow (MODFLOW-2000 and 2005)
  • When export raw point, polyline, or polygon data to shapefiles, VMOD Flex did not create shapefiles correctly. In some cases, the shapefiles could not be loaded in Third-party software
  • In the Import Data window, wells shows up twice in the list of data object types, after you close and reopen a project
  • The attributes below the Layer view (on status bar) did not refresh when changing the mouse locations for rotated grids.
  • Inactive cells were not showing up correctly for models with rotated grids
  • At the end of the PEST workflow, after save results as new run, in the new model run the head observations were not included on the model tree.
  • Could not create numerical grid with certain layer number configurations
  • PEST - after doing update model inputs,  the PEST workflow was also being cloned
  • When edit a conceptual boundary condition, the attribute values for species concentrations did not show up
  • In settings for imported 3D Grid object (.HDS) the transient output times were not showing correctly
  • During import VMOD Classic model with a few thousand wells, there was a very long delay when calculating time schedules
  • For a USG Grid, 3D Viewer, displaying Cells, the Legend option was not working
  • After import 3d grid object (HDS), the time values were not using the correct units from the project settings
  • Transparency did not work for 3D Gridded objects (eg. MODFLOW conductivity) for cells view
  • Error saving project, with USG numerical models (only occurred in certain computer/regional setting configurations)
  • Stand-alone 3D viewer was showing results from previous MODFLOW run (and was not refreshing after a re-run of the model)
  • After importing a Surface data object, when View Spreadsheet, values were showing duplicate XYZ values.
  • Storage property zone values were flipped/mirrored after importing a model from VMOD Classic
  • Error during import of project with rotated particles, and particles did not show in the correct location
  • 3D view, Z axis labels were mirrored/flipped, when viewing simple surfaces.
  • Improved the loading time in Flex viewer when displaying Recharge and EVT Boundary Condition cell zones.
  • Define Properties step in numerical workflow was reverting back to displaying Conductivity every time you return to this step
  • The status bar was cutting off the last few digits for Kx, when the value is E-04 range, and was incorrectly rounding up
  • When importing a surface, if you chose a text file that contains XYZ points, and not gridded ESRI ASCII .GRD, you got an error.
  • Improved engine run times by disabling detailed logging.
  • In PEST workflow,  were encountering error when trying to generate .PST file at the Sensitivity Analysis step (with certain parameter configurations)
  • When edit attributes for Specified Flux numerical boundary condition, the wrong units were being displayed.
  • MT3D runs failed due to problem with MXSS value in the SSM package
  • Improved error message at Translate step, when using the Initial Heads option “ Use Heads from previous MODFLOW Run” and the .HDS file could not be found
  • Error "object reference" occurs if you add a structural zone to the grid without first creating a new property zone (in Conceptual Model workflow)
  • Fixed the zoom level for 2D view by Row or Column,  when you adjust the vertical exaggeration
  • In 2D viewer, when editing points, it was taking a long time to add new points when other viewers were opened.
  • Unable to import well data (Excel data file-specific), and unable to convert pumping rates from L/day to project units.
  • 3D viewer, Settings/Isosurface, the correct values were not appearing when returning back to Edit an Isosurface
  • Added option to Edit/Single and Edit/Group for Specified Flux boundary condition in the numerical modeling workflow (MODFLOW-2000 and 2005)
  • MODFLOW USG, 3D viewer, showing slice, when reload style settings, make change to slice, it restores the Cells view.
  • Increased precision for the label for time values in the Head style settings
  • Improved the conversion time for Recharge and Evapotransperation boundary conditions when going from Conceptual Model to Numerical Model (MODFLOW-2000, 2005 and LGR)
  • Error when trying to create a surface with a blank point data object
  • Get error when creating a Surface if using points object created from an operation. (eg. well tops or HGA XS)
  • Fixed the behavior of the Assign and Edit buttons at the Define Boundary Conditions step (Numerical Workflow) in the event when you do not complete one of the selected actions; added an option to “Cancel Editing” when right-clicking on the view, will take you back to the original state.
  • Define Particles, when add new particles this was always overwriting the previously defined set of particles
  • Import Surface data object, if you chose a .txt file that is not ESRI ASCII grid format (such as XYZ points), you would encounter a non-user friendly error
  • When creating Voronoi USG grid consecutive times with the same grid generator settings, the resulting grid cell count was not exactly the same
  • Error message and program freezes when importing certain polyline objects

Build 2.0.102 (January 2014)

Defects Addressed

  • Problems importing 3D Gridded Data Object, TecPlot .DAT file format
  • PEST utilities were being flagged as potential virus threat on certain virus scanners
  • Inactive cells were showing up incorrectly in all layers of the model, instead of the specified layers
  • When using initial heads from a previous MODFLOW run, if the model contained inactive cells, the heads were not rendered correctly in the results
  • In some cases there was a problem using a .HDS file from a previous MODFLOW run for initial heads, when cycling between multiple projects
  • An error would occur when defining a new property zone with a polygon, after doing conversion from the conceptual model
  • Unable to create horizons for surfaces that have undefined values around the edges
  • When import polygon as .DXF format, in some cases the file would not load as a closed polygon

Build 2.0.88, v.2014.1 Release (November 2013)

Additions

  • added support for MODFLOW-USG
  • added option to define inactive cells for MODFLOW-2000/2005 grids in the numerical workflows
  • import transport boundary conditions when importing a VMOD Classic .VMF file project
    import concentration observation well data when importing a VMOD Classic .VMF project

Defects Addressed

  • in some cases, the cell attribute value for linear conceptual boundary conditions calculated using the method "Use Surface" were incorrect. The value was an average based on the min and max value from the start and end point of the line, as opposed to the actual surface value at the cell's XY location. The magnitude of the error increases when the selected surface object has a wider range of max-min, and the line segment is longer.
  • fixed incorrect BT3 translation for initial concentrations for models that have inactive cells
    PEST translation, in some cases observations were not converted to the correct layer

Build 1.0.437.1, v.2013.1 Release (June 2013)

Additions

  • added support for defining and running transport models using MT3DMS
  • enabled the Create Numerical Grid step, with options to define the grid extents and define layer elevations (constant value) or with surfaces
  • improved the selection of workflow windows and viewer windows, with a "tab" approach across the top of the main window.
  • added option to define the layer order in 2D Layer views (and move layers up, down, to top and to the bottom)
  • improved Export PEST results to Charts; now populates pre-defined chart templates.
  • added option to delete Pilot points in the PEST workflow
  • improved error handling in PEST workflow, if you change the selected parameters, or adjust the numerical model.
  • in PEST workflow, added option to export sensitivity results to Excel charts.
  • added option to delete a PEST workflow from the model tree.
  • PEST will not run using a numerical model generated from conceptual model boundary conditions that are all steady-state
  • moved log files from ...\Schlumberger\HGB" to "...\Schlumberger\VMODFlex".
  • PEST, default transformation set to log for Kx and Kz parameters
  • provided an option to view/edit pumping well attributes at the Define Boundary Conditions step in the numerical model workflow.
  • added option to import MT3DMS results, .UCN file
  • added GUI shortcut to Define New Pumping Wells, at the Define Boundary Conditions step in the numerical model workflow.

Defects Addressed

  • constant head BC cells were not being assigned to the correct layer, when using the "Use Surface" option, after converting conceptual model to numerical model
  • fixed project specific issue, converting to numerical model caused error with incorrect Kx calculation
  • could not add particles to a numerical model - project specific
  • pathlines were shifed in the results with rotated grids
  • received error when trying to edit boundary condition cells, if the numerical model originated from a conceptual model.
  • unable to run Sensitivity Analysis in the PEST workflow - project specific
  • error occurred when trying to show a structural zone or property zone in 3D viewer, if geometry was invalid.
  • MODFLOW-LGR was not giving correct results with the SAMG solver.
  • exception occurs during "Edit Grid" step (refine rows/cols), if you set End row to be the last row.
  • error during translation to Finite Element model (project specific)
  • error when closing the 2D viewer if it is in pick/edit mode.
  • error in 2d viewer when showing a corrupted polyline (with only 1 vertex)
  • in some cases, Heads and Drawdown were removed from the model tree, after reloading a previously saved project.
  • the "Project/Save As" option was not working correctly; the MODFLOW packages were not being copied to the new directory.

Known Issues with VMOD Flex

The following are the known issues with VMOD Flex:

  • Some virus scanners may flag certain PEST utilities as exhibiting malicious behaviour; this is a false positive warning, and these files should be added as exceptions/inclusions in the virus scanner software.
  • Cannot adjust the numerical grid once the model inputs have been defined. As a workaround, you can create another numerical model, and run the Conceptual to Numerical model conversion for this new grid.
  • When importing a VMOD model with transport, the MT3DMS solver and output time settings are not imported. You need to manually re-assign these at the Translate step.
  • You may encounter an error when opening a project, or running a model, which is stored on any one of the following: RAM disk, external drive, or network drive. In these cases, copy the project to the local hard disk, and try opening and running the model again.
  • On Windows XP, sometimes when you Define a New Boundary condition the first time, the dialog may not be populated. Just click Cancel, and repeat the same steps again
  • PEST: when plotting parameter sensitivity values, if a parameter is log-transformed, the sensitivity is expressed with respect to the log of that parameter. The relative composite sensitivity of a log-transformed parameter is determined by mutiplying the composite sensitivity of that parameter by the absolute log of the value of that parameter.
  • Uninstalling VMOD Flex may impact the performance of VMOD Classic Interface and vice versa. If you need to uninstall VMOD Flex (for updates), then please reinstall the new version right away. Otherwise, if you intend on removing VMOD Flex from your computer, then you will need to reinstall VMOD 2011 prior to using this software again.
  • If you are importing a Visual MODFLOW project with distributed properties, please be sure the $CND file (and $STR, $IHD) files have been generated in Visual MODFLOW. To do this, open your project in Visual MODFLOW Classic Interface, go to Inputs/Properties. Select Tools/Cell Inspector. Turn on All Flow properties. Then, scroll through each layer in your model. When you are finished, save and close the project, and import into VMOD Flex.
  • Rotated grids appear rotated in the 2D views.
  • When show a cross-section through a child grid (for LGR) that has been rotated, the gridlines do not show up correctly. Workaround: Use 3D Viewer.
  • When displaying a grid that contains a child grid (for LGR), and viewing in the Flex Viewer, the selected row, column, or layer is applied only to the parent grid; it is not applied to the child grid.
  • When importing Points, Polygons or Polylines from a .DXF file, only the entities within the .DXF $EXTMIN and $EXTMAX will be imported; any entities outside these extents will not be imported. Therefore, please be sure to prepare your .DXF file properly, prior to importing.
  • Some data object style settings are not saved to the project, e.g., points color, symbol size, etc.
  • For some objects 3D viewer does not fully support color rendering/labelling
  • Polygons with multiple parts are not rendered properly in the 2D Viewer; the holes on the polygons will appear the same color as the polygon for which it overlaps.
  • When draping polygon or polyline over a surface, this is an approximation, since it relies on the vertices of the polygon or polyline to position this in 3D; there may be gaps/locations where it is not completely draped. The same problem occurs when viewing areal or linear boundary conditions in 3D Viewer
  • Vertical datum shifts are currently not supported. VMOD Flex assumes that all data you import is in the same vertical datum.
  • When using Kriging interpolation component, you may need to adjust the min and max radii in order to get an ideal interpolation; these parameter values will depend on your data set. Default values are 100 and 100, you will likely need to increase or decrease these values.
  • A 3D Gridded data object will not be positioned correctly in a 3D Viewer, if the grid origin is modified during the import process.
  • Grid rotation is not supported for imported 3D Gridded TecPlot (.DAT) data objects.
  • In 3D Viewer, child grids may not display correctly if the parent grid only has one layer.
  • In the color by attribute style settings, the MIN, MAX and color interval values may not update when a new attribute is assigned.
  • In a minority of cases where the user has restricted rights on Windows, an error will occur when starting VMOD Flex due to the TEMP folder being set as read-only. Granting full access to the TEMP folder resolves the issue.
  • If recharge boundaries are defined with a time schedule with multiple time entries for the same date, translation will be treated as static instead of transient.
  • When working with a project in Local Cartesian coordinate system, coordinate conversion is currently not supported. Please ensure that any data you import is in the same coordinates, and length (XY) units, as your project local coordinates.
  • Creating 2D Cross-sectional models is currently not supported due to limitations in the assignement of properties and boundary conditions in the numerical model.
  • In some cases, when opening a project from Hydro GeoBuilder or VMOD 3D-Builder, you may not be able to display and use specific grids or meshes; Workaround: Re-create the desired grids or meshes in VMOD Flex.
  • MODFLOW-USG Issues
    • When defining the grid, if your conceptual model includes pumping wells, the wells object must be included as an add-in for the grid definition.
    • In the conceptual model, Property zones defined with the method "Use 3D Gridded Data" is not supported when converting to a USG numerical model
    • Boundary condition attribute method "Use Shapefile Attribute" is not supported when converting to a USG numerical model.
    • Conversion of transient boundary condition objects, with attributes defined at vertices, will show an error.
    • For existing projects, if your conceptual boundary condition has multiple parts, and you edit the attributes, you may face a problem that the "Edit Boundary Condition" GUI does not display the selection correctly (the 2D preview may not show the correct selection) or the attributes grid may be empty. If this is the case, re-create the conceptual boundary condition object.
  • Wall Boundary (HFB) is supported only on MODFLOW-2000 and MODFLOW-2005 models. When doing conceptual to numerical model conversion, only Deformed Grid types are supported
  • During conversion from conceptual model to numerical model for properties, VMOD Flex will use the order in which the conceptual property zones were created to determine the order when assigning to grid cells; if a grid cell is occupied by more than one property zone for the same parameter group, the one that was defined last (most recently) will take priority.
  • No settings for adjusting MODPATH particle color/size, in the Output
  • MODFLOW-LGR flux visualization, values may not be correct for those cells along the parent/child grid interface
  • MODFLOW-USG translation does not take into account boundary conditions that end at different times; 
  • Flux visualization not available for MODFLOW USG models
  • Translate to FEFLOW Model option will not work with the new pumping wells object; workaround: re-defined the pumping wells in FEFLOW
  • PEST is not available for MODFLOW-NWT
  • Import model from VMOD Classic, with distributed property zonation, the values and multipliers may not import correctly
  • In some cases, you may encounter an error when working in the Settings window for 3D Gridded objects (such as Conductivity or Heads); try to click Apply before OK may resolve the error.