pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-4253-bbmg_ABC.ps) >>/Users/jc/w/tmp/Tune-4253-get.log 2>&1" returned status 256
http://www.capeirish.com/webabc/working/source.folders/bbmg/bbmg_ABC.txt

Error exit status 256; here are some files to check:
[P=get.cgi V=1/1 B=0 scale=0.60 512x512 PNG]
filesizedescription
Coll_42535.log 140387 Log file, useful mostly for debugging
Form_4253.log 1666 Log file, useful mostly for debugging
Form_42539.log 890 Log file, useful mostly for debugging
Tune-4253-bbmg_ABC.abc 0 ABC music file with the extracted tune(s)
Tune-4253-bbmg_ABC.ps 0 PostScript
Tune-4253-bbmg_ABC.txt 0 Plain-text file with the extracted tune(s)
Tune-4253-get.log 0 Log file, useful mostly for debugging
Tune-42530-get.log 4270 Log file, useful mostly for debugging
Tune-42531-get.log 2515 Log file, useful mostly for debugging
Tune-42532-get.log 0 Log file, useful mostly for debugging
Tune-42538-get.log 1792 Log file, useful mostly for debugging
These files should be available for 24 hours.