Whenever you use a OS call and check for failure it is as well to display $^E as well (or instead of) $!. In this case, you would get the following: 

warn $!;
Permission denied
warn $^E
The process cannot access the file because it is being used by another
+ process

[download]

Which makes identifying the problem easier, if not the solution.

Examine what is said, not who speaks -- Silence betokens consent -- Love the truth but pardon error.
"Science is about questioning the status quo. Questioning authority".
In the absence of evidence, opinion is indistinguishable from prejudice.
"Too many [] have been sedated by an oppressive environment of political correctness and risk aversion."

In reply to Re^3: Moving directories on Win32 by BrowserUk
in thread Moving directories on Win32 by aplonis

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