pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-12315-2224-Bobin_John.ps) >>/Users/jc/w/tmp/Tune-12315-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/Gow/CR/2224-Bobin_John.abc1.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_12315.log 1104850 Log file, useful mostly for debugging
Tune-12315-2224-Bobin_John.abc 1355 ABC music file with the extracted tune(s)
Tune-12315-2224-Bobin_John.ps 36802 PostScript
Tune-12315-2224-Bobin_John.txt 1355 Plain-text file with the extracted tune(s)
Tune-12315-get.log 4525 Log file, useful mostly for debugging
These files should be available for 24 hours.