The return types for the following stored procedures could not be detected

Question

While drag-drop a stored procedure in dbml file I get this error:

Unknown Return Type
The return types for the following stored

Answer 1

A simple way to solve this issue is (December 2019)

• 1 Just making double # precede #tmp => ##tmp
• 2 Comment out DROP TABLE #tmp => --DROP TABLE #tmp
• Execute stored procedure and make sure that data showed up
• Drag stored procedure again and that's it, It will generate return type
• Last, Turn your store back to first situation and then save.

Hope I can help.