CWMS/HEC-RTS Known Issues

User experiences the following error message when logging into the district T7 "Error logging into CWMS. Check log for more details. Unable to form an encrypted connection to the CWMS Login Server at URL:......

Solution: User may have multiple certificates in the dropdown menu associated with their CAC. Select a more recent certificate and attempt log in again. If this does not resolve the issue please contact HEC for assistance. 

Flow-Diversion and Flow-Combine HEC-HMS parameters are not available within the Model Linking Editor to link from HEC-HMS to other models (such as HEC-RAS).

The recommended work-around is to add a junction in the HEC-HMS model to "collect" the Flow-Diversion from the Diversion element. The flow from the new junction can then be linked in the Model Linking Editor to HEC-RAS. The same approach could be used for Flow-Combine locations if necessary.

This ability has never been supported in CWMS, but will be investigated for inclusion in a future release.

A misleading error message is displayed when the time window selected in the Visualization Tab does not match the gridded data set that is being displayed in the CAVI. The CAVI will display a Warning stating "WARNING: The DSS file given does not exist, but is required to exist" if the CAVI time window chosen does not match the data of the gridded dss file. Modifying the CAVI time window to the time period of the .dss file will allow the gridded data to display in the map window. Error message will be improved in a later release.

When navigating to the "Select Data Validation Sets" dialog from the Acquisition Tab > Data Validation, the "Selection List" now shows the entire pathname instead of just the list of Validation Editor files. 

Ensemble Forecast Run Requires Member Range Entered

When Creating an Ensemble Forecast Run, the Ensemble Members entry cannot be left blank. A range of ensemble members is required, even if all the ensemble members are intended to be used.
Workaround: Enter the range of ensemble members to be used in the forecast.

Ensemble Forecast Processor and DSS Pathname A-Part

To successfully compute an alternative using the Ensemble Forecast Processor (EFP) the A-Part of DSS Pathnames used in the Input Settings > Lookback and Forecast periods must be blank. 

Model Linking - "Get Linkages from.." Button not available in some Instances

From the Model Linking Editor, the button "Get Linkages from.." is greyed out and not available for some forecasts. This includes ResSim only alternatives.

Workaround: Use the "Browse" Button in the Model Linking Editor to manually update a pathname. This will then force the Model Linking Editor to retrieve the updated pathnames from the alternative.

Local Regular Time Series (LRTS) and Pseudo Regular Time Series (PRTS) will not generate warning messages when a time window outside of data range is utilized (if in standalone CWMSVue). A NullPointerException (NPE) will be generated in the log.

If using CWMSVue embedded in the CAVI, a popup message with the NPE with be generated.

If data is present for the time window selected, generating plots and tabular data views work as expected.

When attempting to rename a record that contains a camel-case parameter, CWMS-Vue indicates that the record is successfully renamed but the record is not renamed.

Workaround for CWMS 3.4 - Rename camel-case records in the latest standalone Beta DSSVue.

When doing a new forecast, if there is no extract performed and no data generated by a model, the resulting forecast.dss is version 6 when CWMS wants a DSS version 7 record. 

Workaround: Extract data and/or run a model before trying to open the forecast.dss file

If user attempts to create a new Rating Specification without first adjusting the selection for the Rating Template, the Parameters box on the New Rating Specification form is blank. Attempting to save the Rating Specification throws an exception.

The User Interface does not display any feedback on OK action. If user cancels the form, they receive a message that the Rating Spec was created. After refresh, the Rating Spec will be gone.

Workaround for CWMS 3.4  - If user adjusts the Rating Template selection, the Parameters box will become populated and save action will work.

MetVue Error Messages when memory usage is maxed out

When HEC-MetVue maxes out its memory usage, it sends out red "SEVERE: Error validation response document...".

The error messages are benign, however the program performance at that point will slow down, so best to save the watershed, shutdown the CAVI and restart fresh.

 CWMS-1402

Model Linking Editor does not reflect the inputs specified in the CAVI-MetVue Alternative Editor but does not impact valid simulation computes

When observed and forecast datasets have the same location and parameter IDs (e.g. /SHG/RUSSIAN RIVER/PRECIP///QPE/ for observed and /SHG/RUSSIAN RIVER/PRECIP///QPF/ for forecast), the CAVI Model Linking Editor does not reflect the inputs specified in the CAVI-MetVue Alternative Editor. 

A future enhancement to the CAVI-MetVue alternative is planned where the unique HEC-MetVue Map Window names will be used as location IDs to inform the Model Linking Editor to properly distinguish between the observed and forecast datasets.

Until the future enhancement is done, the CAVI-MetVue alternative computes rely on its own inputs directly rather than the CAVI Model Linking Editor.

CWMS-1976

When using "Save to base" from a forecast, there is a chance that an empty DSS file was copied from the forecast to the main forecast. Then when doing a "Save Watershed As" feature of the CAVI, these empty DSS files lose their relative paths to absolute paths. 

This should not be an operational issue for CWMS users as these values are usually an extract to the forecast.dss file but might cause the HEC-HMS File Reference Dialog to popup with missing references (if the original gets deleted or the model is then handed off to someone else). 

It is recommended that the HEC-HMS model is fully operational from the standalone application (including observed data). If this recommendation is followed, this should not be an issue. 

HEC-HMS changed the way it handled the GIS datasets created when pre-processing the terrain to delineate subbasins. When a terrain dataset is added to a project, a copy is saved to the model's Terrain folder. The terrain pre-processing files, like flow direction and flow accumulation, are saved in the model's GIS folder. An error will happen when migrating to version 4.12 if someone manually deleted the terrain files but left behind the terrain pre-processing files.

This issue has been fixed in HEC-HMS 4.13.

You can work around this issue by copying the terrain back into the Terrain folder (using the same name as the terrain in the project's *.terrain file). You can copy the elevation .tif file from the GIS directory, place it into the Terrain folder, and rename it. 

A compute message like the following is generated; however, the compute will actually run when clicking compute a second time. For now, the work around is to make sure input time-series for OSI variables is INST-VAL.

Error in TSRecord.loadTSData.  Input timeseries //RES-A/FLOW-IN//1HOUR/INPUT/.  Period Average Data can not be interpolated as Instantaneous data
ResSim ERROR: Failed to load time-series records
ResSim ERROR: Failed to compute cumulative local flows

When the user launches the Alternative Editor, user may get a warning message that there are missing time series that need input even though the table is complete. This warning message will appear if there is missing time series in any of the variants. 

As long as the CWMS Time Series table is complete, the user can disregard the warning message. It will not affect their CWMS runs.

For some time series, graphical display with overrides is not updating if user draws it in or enters it into the table. 

Workaround: Select "Refresh Plot" in the OSI

When observed time series are used within OSI, modelers are responsible for ensuring the referenced time series use the correct time step and data type (period average or instantaneous) to be consistent with the alternative. 

Users should be aware of why they may get a warning related to observed data and understand how to address: update the reference data.

HEC-ResSim 3.5 Known Issues

If the user specifies an alternative terrain (i.e. a re-sampled terrain different than the terrain used for computations) for a Saved Map such as Max Depth, then the Saved Map won't be automatically generated during the compute, even if the Floodplain Mapping Box was checked for the simulation. 

Workaround: After the simulation finishes computing, open RAS Mapper and manually compute/update stored maps.