HEC-GeoHMS - can't generate project: System.Runtime.InteropServices.COMException erro

Discussion created by jefftang on Oct 18, 2010
Latest reply on Nov 19, 2013 by anitalin36
Trying to generate a new HEC-GeoHMS project and coming up with the following error when I click Generate Project:

System.Runtime.InteropServices.COMException (0x80004005): Error HRESULT E_FAIL has been returned from a call to a COM component.
at ESRI.ArcGIS.Geoprocessing.GeoProcessorClass.GetEnvironmentValue(String environmentName)
at HECGeoHMS9.GenerateProject.UpdateAHD(String rasterLocation, String vectorLocation, String ahProjName)

I was able to generate the project before with my draft files, but since finalizing our DEM, I can't seem to get past this error.  Any ideas?