PS.: the perl script in the example above is packed as follows: pp -l "C:/Tcl/bin/tcl86.dll" -l "c:/Tcl/bin/tk86.dll" -l "c:/Tcl/bin/zlib1.dll" -a "C:/Tcl;./" -o tktest.exe ./tktest.pl. Important is the period before "/". I don't know, why...