reminds me of some of my code :

else    {
# we should extract the data to some temporary space 
# and migrate it as we can
# for now we just fail gracefully... :(
&ExitOnError( $WarningMes.="[$$] FATAL : can't migrate (missing featur
+e!\n", $rows{JOBID});
}
[download]

Yeah, some day I'll have to write that missing part ;)