pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-1184-1372_North_Bridge_of_Edinburgh.ps) >>/Users/jc/w/tmp/Tune-1184-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/Gow/CR/1372_North_Bridge_of_Edinburgh.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_11840.log 2433095 Log file, useful mostly for debugging
Coll_11841.log 1357751 Log file, useful mostly for debugging
Coll_11847.log 1182125 Log file, useful mostly for debugging
Tune-1184-1372_North_Bridge_of_Edinburgh.abc 1069 ABC music file with the extracted tune(s)
Tune-1184-1372_North_Bridge_of_Edinburgh.ps 38972 PostScript
Tune-1184-1372_North_Bridge_of_Edinburgh.txt 1069 Plain-text file with the extracted tune(s)
Tune-1184-get.log 4920 Log file, useful mostly for debugging
Tune-11846-get.log 5029 Log file, useful mostly for debugging
These files should be available for 24 hours.