Issue In CRM v8.x, calling an Action might fail with the error: ‘Object reference not set to an instance of an object’. The error provided no clues as to the source of the issue; the first thought was that our code was the issue. Investigation Debugging and tracing as we might, all clues led to a platform issue. Upon checking the input parameters, we noticed that some of them are optional. The Entity Reference parameters behave a bit differently when trying to reference them from WF Custom... Read the full text.