All my records suddenly dissapeard from the solution. I just did some change in the startupscript, and then tried to reenter the solution to test if the right layout showed. Then this error should:
and then all the records in the list dissapeard. after this I change this to the right layout :
Then the error dont show anymore, but still all the records are gone. How could this happend? I have no deletion script that could have deleted wrong records at all.