pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-5209-087_Barbara_Allan.ps) >>/Users/jc/w/tmp/Tune-5209-get.log 2>&1" returned status 256
http://roaringjelly.org/~jc/music/book/Chappell/087_Barbara_Allan.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_52092.log 1201138 Log file, useful mostly for debugging
Coll_52098.log 311026 Log file, useful mostly for debugging
Form_52097.log 966 Log file, useful mostly for debugging
Tune-5209-087_Barbara_Allan.abc 596 ABC music file with the extracted tune(s)
Tune-5209-087_Barbara_Allan.ps 36944 PostScript
Tune-5209-087_Barbara_Allan.txt 596 Plain-text file with the extracted tune(s)
Tune-5209-get.log 4538 Log file, useful mostly for debugging
Tune-52098-get.log 9825 Log file, useful mostly for debugging
These files should be available for 24 hours.