Subj : Re: JS_EvaluateUCInStackFrame() question To : netscape.public.mozilla.jseng From : Michael Daumling Date : Mon Sep 05 2005 05:31 pm Yep. That did it. Thanks for the hint! JS_GetFrameCallObject() forces the creation of the arguments and the call object (they are probably created on demand), and JS_EvaluateUCInStackFrame() needs these two objects to resolve local variables and call arguments. Thanks, Brendan! I'll log a bug. Michael .