pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-1754-tune-337-jacks-alive.ps) >>/Users/jc/w/tmp/Tune-1754-get.log 2>&1" returned status 256
http://lesters-tune-a-day.blogspot.fr/2013/08/tune-337-jacks-alive.html

Error exit status 256; here are some files to check:
[P=get.cgi V=1/1 B=0 scale=0.60 512x512 PNG]
filesizedescription
Find_17545.log 1192 Log file, useful mostly for debugging
Form_17549.log 832 Log file, useful mostly for debugging
Tune-1754-get.log 300 Log file, useful mostly for debugging
Tune-1754-tune-337-jacks-alive.abc 0 ABC music file with the extracted tune(s)
Tune-1754-tune-337-jacks-alive.ps 0 PostScript
Tune-1754-tune-337-jacks-alive.txt 0 Plain-text file with the extracted tune(s)
Tune-17541-get.log 1604 Log file, useful mostly for debugging
Tune-17542-get.log 1584 Log file, useful mostly for debugging
These files should be available for 24 hours.