topic 'Object reference not set to an instance of an object' in Arc Hydro Tools. What to do? in Water Resources Questions https://community.esri.com/t5/water-resources-questions/object-reference-not-set-to-an-instance-of-an/m-p/134757#M670 <HTML><HEAD></HEAD><BODY><P style="font-family: arial, helvetica, 'helvetica neue', verdana, sans-serif;">Hi all,</P><P style="font-family: arial, helvetica, 'helvetica neue', verdana, sans-serif;">I have been working with Arc Hydro Tools to perfom catchment analysis for a while now.</P><P style="font-family: arial, helvetica, 'helvetica neue', verdana, sans-serif;">A few days ago, I encountered a new problem: The error warning 'Object reference not set to an instance of an object' after trying to compute drainage lines. In fact, all raster datasets produced by the Arc Hydro Tools before that step were without spatial reference. I tried Define Projection, but as soon as I click on the raster again it tells me the spatial reference is unknown. Even weirder is that after Project Raster and creating a completely new raster with an intact coordinate system, the same error would occur when trying to create drainage lines based on the projected rasters.</P><P style="font-family: arial, helvetica, 'helvetica neue', verdana, sans-serif;">The next morning, everything worked fine again. Unfortunately, now I am getting the same error again and I'm running out of ideas. I cleaned my temporary files folder, set a spatial reference to the whole project, started a new project from scratch, restarted ArcMap and my Laptop various times..</P><P style="font-family: arial, helvetica, 'helvetica neue', verdana, sans-serif;">Has anyone else run into this problem before? Or even found a solution? Any help would be greatly appreciated!</P></BODY></HTML> Wed, 17 Sep 2014 12:56:35 GMT StefanieSteinbach 2014-09-17T12:56:35Z 'Object reference not set to an instance of an object' in Arc Hydro Tools. What to do? https://community.esri.com/t5/water-resources-questions/object-reference-not-set-to-an-instance-of-an/m-p/134757#M670 <HTML><HEAD></HEAD><BODY><P style="font-family: arial, helvetica, 'helvetica neue', verdana, sans-serif;">Hi all,</P><P style="font-family: arial, helvetica, 'helvetica neue', verdana, sans-serif;">I have been working with Arc Hydro Tools to perfom catchment analysis for a while now.</P><P style="font-family: arial, helvetica, 'helvetica neue', verdana, sans-serif;">A few days ago, I encountered a new problem: The error warning 'Object reference not set to an instance of an object' after trying to compute drainage lines. In fact, all raster datasets produced by the Arc Hydro Tools before that step were without spatial reference. I tried Define Projection, but as soon as I click on the raster again it tells me the spatial reference is unknown. Even weirder is that after Project Raster and creating a completely new raster with an intact coordinate system, the same error would occur when trying to create drainage lines based on the projected rasters.</P><P style="font-family: arial, helvetica, 'helvetica neue', verdana, sans-serif;">The next morning, everything worked fine again. Unfortunately, now I am getting the same error again and I'm running out of ideas. I cleaned my temporary files folder, set a spatial reference to the whole project, started a new project from scratch, restarted ArcMap and my Laptop various times..</P><P style="font-family: arial, helvetica, 'helvetica neue', verdana, sans-serif;">Has anyone else run into this problem before? Or even found a solution? Any help would be greatly appreciated!</P></BODY></HTML> Wed, 17 Sep 2014 12:56:35 GMT https://community.esri.com/t5/water-resources-questions/object-reference-not-set-to-an-instance-of-an/m-p/134757#M670 StefanieSteinbach 2014-09-17T12:56:35Z Re: 'Object reference not set to an instance of an object' in Arc Hydro Tools. What to do? https://community.esri.com/t5/water-resources-questions/object-reference-not-set-to-an-instance-of-an/m-p/134758#M671 <HTML><HEAD></HEAD><BODY><P>I just replied to a similar question at <A href="https://community.esri.com/thread/113912">DEM Reconditioning: Err Msg "Object ref not set to an instance of an object."</A> .</P></BODY></HTML> Fri, 26 Sep 2014 16:38:56 GMT https://community.esri.com/t5/water-resources-questions/object-reference-not-set-to-an-instance-of-an/m-p/134758#M671 MarkBoucher 2014-09-26T16:38:56Z Re: 'Object reference not set to an instance of an object' in Arc Hydro Tools. What to do? https://community.esri.com/t5/water-resources-questions/object-reference-not-set-to-an-instance-of-an/m-p/134759#M672 <HTML><HEAD></HEAD><BODY><P>Thanks a million for your answer, who would have thought it could be so easy? My problem was resolved by putting all layers into my geodatabase.</P></BODY></HTML> Mon, 29 Sep 2014 09:02:40 GMT https://community.esri.com/t5/water-resources-questions/object-reference-not-set-to-an-instance-of-an/m-p/134759#M672 StefanieSteinbach 2014-09-29T09:02:40Z