Actually they aren't. Perl doesn't interpolate single quoted strings. The actual issue is that OP defined a file for output and is then trying to tack a filename onto the end of it and open it for writing, ie 'D:\research\audit fee models\filings\filenames\filenames.txt'.'/'.$filename

No idea about Linux, but this doesn't work in a Windows world

In reply to Re^2: Failed to open file for write by SimonPratt
in thread Failed to open file for write by wrkrbeee

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