Error import solution

Hello!

I start to use Servoy 8.2 and I try to import my solution in my server. I recive this error:

some one knows what its the problem. some ideas?

This error was mentioned several times on the forum.
For example viewtopic.php?f=11&t=21550

It usually happens after some kind of refactor in the solution under different conditions.
I think it’s easier to just stop server, delete the contents of the repository database and start fresh. (or course all the old content (solutions, styles, db info, …) on that app. server will be deleted in the process)