pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-4812-21351_Muirland_Willie.ps) >>/Users/jc/w/tmp/Tune-4812-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/ERM/21351_Muirland_Willie.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_48120.log 908420 Log file, useful mostly for debugging
Form_4812.log 965 Log file, useful mostly for debugging
Form_48121.log 957 Log file, useful mostly for debugging
Form_48125.log 1071 Log file, useful mostly for debugging
Form_48128.log 923 Log file, useful mostly for debugging
Tune-4812-21351_Muirland_Willie.abc 541 ABC music file with the extracted tune(s)
Tune-4812-21351_Muirland_Willie.ps 34273 PostScript
Tune-4812-21351_Muirland_Willie.txt 541 Plain-text file with the extracted tune(s)
Tune-4812-get.log 15551 Log file, useful mostly for debugging
Tune-48127-get.log 1400 Log file, useful mostly for debugging
These files should be available for 24 hours.