pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-20012-Worse_for_Better.ps) >>/Users/jc/w/tmp/Tune-20012-get.log 2>&1" returned status 256
http://roaringjelly.org/~jc/music/book/GM/Worse_for_Better.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_20012.log 145383 Log file, useful mostly for debugging
Form_20012.log 2124 Log file, useful mostly for debugging
Tune-20012-Worse_for_Better.abc 836 ABC music file with the extracted tune(s)
Tune-20012-Worse_for_Better.ps 34255 PostScript
Tune-20012-Worse_for_Better.txt 836 Plain-text file with the extracted tune(s)
Tune-20012-get.log 16084 Log file, useful mostly for debugging
These files should be available for 24 hours.