I am having this error while using Arch hydro and HEC-GeoHMS tools in Arc map, i wonder if any one of have a solution for that error:

[OmarNofal]

This is the error:
System.Runtime.InteropServices.COMException (0x80004005): Error HRESULT E_FAIL has been returned from a call to a COM component.

   at ESRI.ArcGIS.Geoprocessing.GeoProcessorClass.Execute(String Name, IVariantArray ipValues, ITrackCancel pTrackCancel)

   at ESRI.APWR.ApHydro.ArcHydroOp.DEMReconditioningGP(ApLayers apLayers, Double numCellsBuff, Double sharpDrop, Double smoothDrop, Boolean raiseNegative, Boolean bUsingStreamGridInput, ITrackCancel& trackcancel, IGPMessages& messages, String& exMessage) in C:\Builds\HydroSolutions\10.5_ArcHydro\Sources\ArcHydroTools\src\ApHydro\ArcHydroOp.vb:line 63089

Failed to execute (DEMReconditioning).

Failed at Mon Aug 26 20:36:03 2019 (Elapsed Time: 14 minutes 56 seconds)

[EllenFehrs · Accepted solution]

Not sure if this is your problem, but have you tried checking your Target Locations under ApUtilities? I got a similar error when I accidentally left my Raster Data set to a Personal/File Geodatabase instead of a Shapefile/Raster Workspace. It's a pain in the butt, but you should probably check ApUtilitiesConfig / DefaultConfic / HydroConfig individually.

[OmarNofal]

Actually that was the problem, I was able to solve by renaming the whole extension and never leave spaces in the name of the folders within the directory location. It takes me 3 weeks to know that after a lot of trials.

[EllenFehrs]

Glad you figured it out!

[jelan]

this worked for me! thanks a lot!

[ns90tnau]

Thanks, @EllenFehrs. I too had the same problem and followed your advice. Now, it is resolved.

[TesfaAndualem]

Failed to execute (DEMReconditioning).

error:

System.Runtime.InteropServices.COMException (0x80004005): Error HRESULT E_FAIL has been returned from a call to a COM component.

   at ESRI.ArcGIS.Geoprocessing.GeoProcessorClass.Execute(String Name, IVariantArray ipValues, ITrackCancel pTrackCancel)

   at ESRI.APWR.ApHydro.ArcHydroOp.DEMReconditioningGP(ApLayers apLayers, Double numCellsBuff, Double sharpDrop, Double smoothDrop, Boolean raiseNegative, Boolean bUsingStreamGridInput, ITrackCancel& trackcancel, IGPMessages& messages, String& exMessage) in C:\Builds\9\s\ArcHydroTools\src\ApHydro\ArcHydroOp.vb:line 63019