Extensibility SDK, Visual Studio template not working

[RonaldLopez]

I've created a solution with the Visual Studio template provided with the Extensibility SDK, I used the sample as-is with no changes by me, the solution compiles fine with no errors, but the sample tool will not load into the Application Builder, I keep getting the onerous "object reference not set to an object" error that we all know and love 🙂

I've received this error with both the Viewer 1.0 Beta, and the newly released 1.0 version.

[RonaldLopez · Accepted solution]

My apologies for not posting my resolution sooner.

In this case I did 2 things that resolved the issue.

1. Completely wiped out the debug directory manually via Windows Explorer, some of the files weren't getting updated
2. This was probably the real issue, there was a mismatch of ArcGIS Silverlight SDK/Extensibility SDK assemblies between the development box I was using and my local ArcGIS Server, I noticed this mismatch when reviewing the solution's references Path attribute, I upgrade the dev box and started from scratch with the example and all was well.

Regards