Try 
BEGIN {
  use CGI::Carp qw(carpout);
  open(LOG, ">>/usr/local/cgi-logs/mycgi-log") or
    die("Unable to open mycgi-log: $!\n");
  carpout(LOG);
}

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In reply to Re: stderr to script-logfile with CGI::Fast by Anonymous Monk
in thread stderr to script-logfile with CGI::Fast by poulhs

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