I'm confused - you said your later changes (to allow the write to complete) solved the problem, but that doesn't explain at all why Win32::SerialPort acted differently on a restart than a non-Perl application. Where is the state informations saved, or what is Win32::SerialPort looking at that other apps don't?

In reply to Re: Win32::SerialPort Error: Overlapped-I/O operation is in progress by dcd
in thread Win32::SerialPort Error: Overlapped-I/O operation is in progress by Dr. Mu

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