pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-8485-proto.ps) >>/Users/jc/w/tmp/Tune-8485-get.log 2>&1" returned status 256
http://roaringjelly.org/~jc/music/book/DftY/1780/Thompson/proto.abc

Error exit status 256; here are some files to check:
[get.cgi V=1/1 B=0 scale=0.55 512x512 PNG]
filesizedescription
Form_84854.log 984 Log file, useful mostly for debugging
Form_84858.log 874 Log file, useful mostly for debugging
Tune-8485-get.log 8153 Log file, useful mostly for debugging
Tune-8485-proto.abc 534 ABC music file with the extracted tune(s)
Tune-8485-proto.ps 30938 PostScript
Tune-8485-proto.txt 534 Plain-text file with the extracted tune(s)
Tune-84852-get.log 3468 Log file, useful mostly for debugging
Tune-84854-get.log 3753 Log file, useful mostly for debugging
Tune-84857-get.log 2773 Log file, useful mostly for debugging
These files should be available for 24 hours.