Error during conversion in the web application designer 2004s?

Hello there,

When I'm converting a template from 3.1 to 7.0(2004s) whit the migrationtool, I get an error whit a big screen. Then the WAD closes down. I can ignore, retry or break down. Does somebody know what the problem is?I have done other queries and they converted good. It is a query whit selections and formulas. I've tried anything. could someone help me?