Re: Directory creation failing

[BazB]

Try mkdir($dir) or die "Unable to create directory $dir: $!"; (obviously assigning $dir first).
$! should give you a clue.

If you're trying to create a hierarchy/tree of directories, you should look at File::Path's mkpath call.
File::Path is a standard module.

If you're not doing so already, Use strict warnings and diagnostics or die.