In windows, (by default?) a file can only be opened by one process. The $tf that File::Temp returns is a filehandle opened for writing. Your system command starts another process which tries to write to the same file, but it's locked by the first process. On *nix, more than one process can write to a file at the same time.

In reply to Re: File::Temp problems on Win32 by runrig
in thread File::Temp problems on Win32 by trek1s

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