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

Question

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?

YUTINGLin · Answer

My DEM is 40mx40m and the units of elevation is m.

AndrewMartinez1 · Answer

I'm having the same problem.  What format is your DEM and what are the units of elevation?

YUTINGLin · Answer

I have the same problem.I came out this error with Arc Hydro and HEC-GeoHMS for ArcGIS 10 .1 (version 10.1, May 13 2013).Any way to solve it?