IMPORTANT: PREPARE YOUR MODELS FOR THE UPDATE! - Please take the opportunity before migrating to CWMS 3.2.3 to update the base models in your CWMS watersheds so that you encounter fewer problems and to simplify troubleshooting. 

Updating the model files as part of the CWMS 3.2.3 upgrade will proceed more smoothly if the models work correctly in CWMS 3.2.2 and in the standalone versions of each modeling application provided with CWMS 3.2.2.   Prior to opening your watershed in CWMS 3.2.3, please ensure that your watershed can successfully perform the following operations:

  • Make a copy of your CWMS 3.2.2 watershed in a different watershed location and rename the parent folder of the original watershed location.
  • Launch the CWMS 3.2.2 CAVI, select the Setup tab, open your watershed from its new location, then launch HMS from the "native model" icon.  In HMS,  verify that each forecast alternative (used in a CAVI forecast run) successfully computes.  Along the way, resolve any problems with data dependencies so that the model simulation requires only data located within its own watershed model folder; detailed instructions are available in HEC-HMS Best Practices in CWMS.   
  • Using the other "native model" icons, verify that the ResSim alternatives, RAS plans, and FIA alternatives all compute successfully within their applications.
  • Ensure that "keys" are defined for each model alternative.
  • Load each forecast run in the Model Linking Editor and verify that the linking is up to date.   
  • Create and run some forecasts (for a brief time period with known good data) to verify that the extract lists and models operate as expected - particularly for models or linking revised during the previous checks. 

CWMS 3.2.3 includes a newer version of some of the watershed modeling applications than the versions included in CWMS 3.2.2.  If you open an existing CWMS 3.2.2 watershed in the CWMS 3.2.3 CAVI without preparing the models first, each modeling application will attempt to update its model files to be compatible with the new version. This process may require user input as well as changes to the model itself, so it is recommended that, after you verify that you can successfully perform the operations listed above with your CWMS 3.2.2 watershed, you update each model in your watershed with the standalone applications before opening your existing watersheds in CWMS 3.2.3.  Please see the sections below for each modeling application to learn what steps may be needed to properly update the models in your watershed.


Versions of Software used in CWMS 3.2.3:

  • HEC-MetVue – 3.1
  • HEC-HMS – 4.8
  • HEC-ResSim – 3.5 Dev
  • HEC-RAS – 6.1
  • HEC-FIA – 3.2.2
  • CWMS-Vue – 3.2.3