pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-59772-_.ps) >>/Users/jc/w/tmp/Tune-59772-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/contra/_.abc

Error exit status 256; here are some files to check:
[P=tuneget V=1/1 B=0 scale=0.70 512x512 PNG]
filesizedescription
Coll_59772.log 281520 Log file, useful mostly for debugging
Tune-59772-_.abc 156 ABC music file with the extracted tune(s)
Tune-59772-_.ps 30581 PostScript
Tune-59772-_.txt 156 Plain-text file with the extracted tune(s)
Tune-59772-get.log 3688 Log file, useful mostly for debugging
These files should be available for 24 hours.