topic Re: Error occur during generating CNgrid in HECgeoHMS. in Water Resources Questions https://community.esri.com/t5/water-resources-questions/error-occur-during-generating-cngrid-in-hecgeohms/m-p/756607#M3857 <HTML><HEAD></HEAD><BODY><SPAN>Closing this version of the thread,&nbsp; see the active version </SPAN><A href="http://forums.arcgis.com/threads/86029-Error-occur-during-generating-CNgrid-in-HECgeoHMS">http://forums.arcgis.com/threads/86029-Error-occur-during-generating-CNgrid-in-HECgeoHMS</A><SPAN>.</SPAN></BODY></HTML> Wed, 05 Jun 2013 13:57:14 GMT V_StuartFoote 2013-06-05T13:57:14Z Error occur during generating CNgrid in HECgeoHMS. https://community.esri.com/t5/water-resources-questions/error-occur-during-generating-cngrid-in-hecgeohms/m-p/756606#M3856 <HTML><HEAD></HEAD><BODY><SPAN>hi, I am bhavnausing ArcMap9.3 with Windows 7 64 bit. I installed HEC-GeoHMS version 5.0, ArcHydro tool9 for watershed modelling. when i tried to generate CNGrid (input fil, Lulc_soil_union and CNLookup table) from utilities of HEC-GeoHMS, its doesnot generating CNGrid (Grid formate) and showing the massage below</SPAN><BR /><SPAN>" System.NullReferenceException: Object reference not set to an instance of an object.</SPAN><BR /><SPAN>at ESRI.APWR.HECGeoHMS9.GPGenerateCNGrid.GenerateCNGridWk(ApLayers apLayers, Int32 debug, ITrackCancel&amp; trackcancel, IGPMessages&amp; messages, String&amp; exMessage)</SPAN><BR /><SPAN>Failed to execute (GenerateCNGrid)."</SPAN><BR /><BR /><A class="jive-link-email-small" href="mailto:bhavnapardhi90@gmail.com">bhavnapardhi90@gmail.com</A></BODY></HTML> Wed, 05 Jun 2013 13:34:15 GMT https://community.esri.com/t5/water-resources-questions/error-occur-during-generating-cngrid-in-hecgeohms/m-p/756606#M3856 bhavnapardhi 2013-06-05T13:34:15Z Re: Error occur during generating CNgrid in HECgeoHMS. https://community.esri.com/t5/water-resources-questions/error-occur-during-generating-cngrid-in-hecgeohms/m-p/756607#M3857 <HTML><HEAD></HEAD><BODY><SPAN>Closing this version of the thread,&nbsp; see the active version </SPAN><A href="http://forums.arcgis.com/threads/86029-Error-occur-during-generating-CNgrid-in-HECgeoHMS">http://forums.arcgis.com/threads/86029-Error-occur-during-generating-CNgrid-in-HECgeoHMS</A><SPAN>.</SPAN></BODY></HTML> Wed, 05 Jun 2013 13:57:14 GMT https://community.esri.com/t5/water-resources-questions/error-occur-during-generating-cngrid-in-hecgeohms/m-p/756607#M3857 V_StuartFoote 2013-06-05T13:57:14Z