This message says "your script broke and it didn't send any HTTP headers before sending the error messages". Some suggestions for further investigation:
- Check the error message that was written in your apache error log.
- Switch off output buffering (set $| to a true value) to ensure that headers get out before your errors.
- Put use CGI::Carp qw(fatalsToBrowser) to make debugging easier (but remove it before putting the script live).
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