Error message using FillSink Tool on Hec-GeoHMS Toolbar

Discussion created by kbyars on Aug 23, 2011
I am getting the following error message trying to go thru the example problem for Hec-GeoHMS that I downloaded off of the HEC website.

System.Runtime.InteropServices.COMException (0x80041098): ERROR 010067: Error in executing grid expression.
   at ESRI.ArcGIS.SpatialAnalyst.RasterHydrologyOpClass.Fill(IGeoDataset surfaceRaster, Object& zLimit)
   at ESRI.APWR.ArcHydroGPTools.AHFillSinks.Execute(IArray paramvalues, ITrackCancel trackcancel, IGPEnvironmentManager envMgr, IGPMessages message)
Failed to execute (FillSinks).

Can anyone please help me?