GP service: ERROR 000816: The tool is not valid.

[springzhang]

I have successfully published a custom GP service from ArcMap. The GP tool is in C#.  The built DLL was registered in both ArcGIS desktop and server through ESRIRegAsm.  The tool run well in ArcMap. But when i run the service, I got the error "Error executing tool.: ERROR 000816: The tool is not valid." Any idea why?

My ArcGIS server version is 10.4.5524

Desktop version is 10.4.5524

.Net framework version is 4.5.1

PS: I also navigated to the directory on Server: C:\arcgisserver\directories\arcgissystem\arcgisinput\{my service name}.GPServer\extracted\v101..., and run the tool there in ArcMap, it run well.

[LukeCatania]

Did you ever find a solution?  I have this issue in Runtime for Java.  A simple Extract By Mask Tool works on Desktop, but gives the error in runtime.

[springzhang]

Sorry for the late reply.

My problem was caused by the wrong input types. In my codes, one of the gp parameters was set to be GPLong, but it was used as String in the implementation part. After I changed the type from GPLong to GPString, the error disappeared. It seems that ArcServer is more strict with the parameter types.

Hope it helps you.

[Robert_LeClair]

Do you have any Business Analyst GP tools in your GP service?  If so, they will throw this error.

[springzhang]

Actually no. 

I have already fixed the problem. Thanks!

[FreddieGibson]

Could you upload the source code for your GPFunction? Also, when you say you registered it with the server did you use the 64 bit esriregasm?

[springzhang]

Thanks, I have already fixed the problem