I got just the same results as you ! And i don't think it's the problem of tk_internal_path because i config this correctly but still get the same error. I hope somebody can solve this problem.It wasted too much of my time! I build ITK CVS latest version,CableSwig CVS latest version on Winxp platform with CMake 1.8,Python 2.3.3,tcl/tk 8.4.6 and MSDEV 6.0(sp5)