The following message is a courtesy copy of an article that has been posted to comp.emacs.xemacs as well. Gunnar Evermann <ge204(a)eng.cam.ac.uk&gt; writes: This is not in the PROBLEMS file, I think. What's in there is some Motif 2.1 related stuff which also happens on AIX/Motif 2.1: xemacs: X Error of failed request: BadGC (invalid GC parameter) It appears to be a XEmacs related bug. PHSS_19964, X/Motif2.1:Runtime:Oct:99 should fix the problem of the not existing "windowed ancestor". I'll provide a patch to the PROBLEMS file. HTH, --Marcus