Hi, Recently, a strange error has occured for me, which may be related to my upgrade to version 4.11. Sometimes, after compiling my project (in vs.net 2002/ .net 1.0), on the first excecution of a page, the critical exception ExcecutionEngineException occurs. It occurs sporadically, and I have not at all been able to pinpoint the cause. An exception 'System.ExecutionEngineException' has occured in /LN/W3SVC/ROOT-2-126985865545937500. Does anyone have any similar experiences, and any ideas about what it might be? Cheers /Johan