pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-91808-PrinceOerTheWater.ps) >>/Users/jc/w/tmp/Tune-91808-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/Scotland/PrinceOerTheWater.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_91808.log 275900 Log file, useful mostly for debugging
Tune-91808-PrinceOerTheWater.abc 2489 ABC music file with the extracted tune(s)
Tune-91808-PrinceOerTheWater.ps 57586 PostScript
Tune-91808-PrinceOerTheWater.txt 2489 Plain-text file with the extracted tune(s)
Tune-91808-get.log 5047 Log file, useful mostly for debugging
These files should be available for 24 hours.