topic arcobjects run "intersect" gp tool, get "Object reference not set to an instance of an object" error in ArcObjects SDK Questions

arcobjects run "intersect" gp tool, get "Object reference not set to an instance of an object" error

LiYao — Tue, 14 Oct 2014 06:55:54 GMT

Dear all,

I am using vb.net arcobjects to run "intersect" GeoProcessing tool, but get "Object reference not set to an instance of an object" error.

My code is as follows:

Dim objGP As IGeoProcessor = New GeoProcessor

Dim InputLayer = "dev_db.DBO.Segment;dev_db.DBO.LINE_1"

Dim output = "D:\dev\Seg_line_intersect"

objGP.OverwriteOutput = True

Dim objParameters = New VarArray

objParameters.Add(InputLayer)

objParameters.Add(output)

Dim objResult As IGeoProcessorResult = objGP.Execute("Intersect_Analysis", objParameters, Nothing)

The error is:

There are selected features in the segment layer.

I am using arcmap 10.2.2.

I failed to find what's wrong with my code, please kindly advice on it, thanks a lot.

Re: arcobjects run "intersect" gp tool, get "Object reference not set to an instance of an object" error

Anonymous User — Thu, 16 Oct 2014 20:53:14 GMT

Hi Li Yao,

First reason for this error would be the path for input layers. I see that you are using the layers from SDE, but not specifying the SDE properties or geodatabase location. So add the sde file location as the default workspace as follows:

objGP.SetEnvironmentValue("workspace", "C:\temp\SQLDirect.sde")

Second reason would be the output path. If this is a geodatabase then the path should be "D:\dev.gdb\Seg_line_intersect". If this is a shapefile then the path should be "D:\dev\Seg_line_intersect.shp".

Try this out and let me know if this helps.

Thanks,

Mohini

Re: arcobjects run "intersect" gp tool, get "Object reference not set to an instance of an object" error

LiYao — Fri, 17 Oct 2014 00:46:03 GMT

Hi Mohini,

Thanks for the reply, I have already solved the issue.