pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-9633-x13.ps) >>/Users/jc/w/tmp/Tune-9633-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/Contra/x13.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_96330.log 372845 Log file, useful mostly for debugging
Coll_96339.log 121520 Log file, useful mostly for debugging
Tune-9633-get.log 3709 Log file, useful mostly for debugging
Tune-9633-x13.abc 177 ABC music file with the extracted tune(s)
Tune-9633-x13.ps 32698 PostScript
Tune-9633-x13.txt 177 Plain-text file with the extracted tune(s)
Tune-96332-get.log 5058 Log file, useful mostly for debugging
These files should be available for 24 hours.