pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-2073-bbmg_ABC.ps) >>/Users/jc/w/tmp/Tune-2073-get.log 2>&1" returned status 256
http://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_20737.log 142807 Log file, useful mostly for debugging
Tune-2073-bbmg_ABC.abc 575 ABC music file with the extracted tune(s)
Tune-2073-bbmg_ABC.ps 35897 PostScript
Tune-2073-bbmg_ABC.txt 575 Plain-text file with the extracted tune(s)
Tune-2073-get.log 7696 Log file, useful mostly for debugging
Tune-20731-get.log 7757 Log file, useful mostly for debugging
Tune-20732-get.log 4008 Log file, useful mostly for debugging
These files should be available for 24 hours.