pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-4273-032_Highland_Laddie.ps) >>/Users/jc/w/tmp/Tune-4273-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/Barsanti/032_Highland_Laddie.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_4273.log 469610 Log file, useful mostly for debugging
Coll_42731.log 472411 Log file, useful mostly for debugging
Coll_42736.log 472410 Log file, useful mostly for debugging
Form_42737.log 1028 Log file, useful mostly for debugging
Tune-4273-032_Highland_Laddie.abc 1333 ABC music file with the extracted tune(s)
Tune-4273-032_Highland_Laddie.ps 39427 PostScript
Tune-4273-032_Highland_Laddie.txt 1333 Plain-text file with the extracted tune(s)
Tune-4273-get.log 4609 Log file, useful mostly for debugging
Tune-42730-get.log 5774 Log file, useful mostly for debugging
Tune-42731-get.log 5087 Log file, useful mostly for debugging
Tune-42736-get.log 3200 Log file, useful mostly for debugging
These files should be available for 24 hours.