I'm not sure how Open2() works, but i DO know the way perl2exe works, and if your problem occurs only when you use the -gui option, then it might be that Open2() uses command line functionality such as system(command) or backquotes (`command`), which are disabled by the -gui option in perl2exe. (a trade for having that ugly console window disappear, i'm afraid.) i could be wrong, but that's my guess...

______________________________________________
RIP
Douglas Noel Adams
1952 - 2001