I suppose the string needs to be put in quotes someplace - which place ? Is it in MyConfig.pm file in .cpan ?

Well, I've seen that before in a few , but I don't recall from memory off the top of my head where/what/how

Maybe  cpan[1]> o conf or whatever

Maybe update %userprofile% and other vars to use shortnames if you've got that configured

Maybe patch path in pl2bat ... Re: exec not working?

OTOH, I don't think cpanp will have problem with it, I prefer cpanp