Error HRESULT E_FAIL has been returned from a call to a COM component !!! Resolved 

While delineating the watershed in ArcSWAT one will get error like
Error Number: -2147467259
Error Message: HRESULT E_FAIL has been returned from a call to a COM component.
In this video, you can resolve the error by changing Parallel processing environment setting in ArcGIS environment.
#arcgis
#ArcSWAT
#Error Number: -2147467259
#ErrorHRESULTE_FAILhasbeenreturnedfromacalltoaCOMcomponent
#parallelprocessing
#watersheddelineation