Error registering plugins and/or workflows. Plug-in assembly does not contain the required types or assembly content cannot be updated

Question

I implemented one custom workflow in in Visual Studio 2010 using CRM 2011 Developer Toolkit. It was working fine with system generated namespace. But, when I changed the nam

Answer 1

Your version needs to be the same one as the one that has been published already for an Upgrade. We had an Assembly version of 1 major, 0 minor - and the one we tried to publish was 12 major, 0 minor.

We changed the Visual Studio solution number back to version 1.0.0.0, Build, Load Assembly, Update - and it worked!

Deleting it would NOT solve the issue due to the dependencies from Workflows if they were used.

We switched Tracing On and found the SQL script to find the culprit.