Assertion Error (Runtime Crash while Running an Application)

Assertion error usually cause by Corrupted application. Either whole application, or maybe just one window.
So what we should do when this error occured:

1. Try to recompile the application by deleting these files in application directory: *.wvw, *.avl, *.$$$, RETENTIV.*
2. If the error still occured, try to check which window caused the error ( it will stop compiling when we start windowviewer). Delete that window via windowmaker, then try windowviewer again.