Error while removing custom entity in Crm 2011

Question

I can't delete a custom entity in MS CRM 2011 Rollup 11. While I'm trying to delete entity (it takes 5-7 min then there is an error) CRM freezes.

SQL profiler and DiagTool didn't give an answer. There were some errors, but they did not relate to the work of CRM. I've checked deletion of relationships, it's impossible too.

Answer 1

Once you install a managed solution you are not allowed to delete any of its entities, attributes, relationships, reports and OptionSets. This post provides a simple and supported workaround if you absolutely need to delete one of these components from a deployed managed solution.

Read this link for further detail.