pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-9617-proto.ps) >>/Users/jc/w/tmp/Tune-9617-get.log 2>&1" returned status 256
http://roaringjelly.org/~jc/music/book/DftY/1778/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
Coll_96171.log 228355 Log file, useful mostly for debugging
Tune-9617-get.log 4505 Log file, useful mostly for debugging
Tune-9617-proto.abc 535 ABC music file with the extracted tune(s)
Tune-9617-proto.ps 30938 PostScript
Tune-9617-proto.txt 535 Plain-text file with the extracted tune(s)
Tune-96171-get.log 8772 Log file, useful mostly for debugging
Tune-96173-get.log 51162 Log file, useful mostly for debugging
Tune-96179-get.log 7255 Log file, useful mostly for debugging
These files should be available for 24 hours.