pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-1115-JustFaceTheMusic.ps) >>/Users/jc/w/tmp/Tune-1115-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/Scotland/JustFaceTheMusic.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_1115.log 284330 Log file, useful mostly for debugging
Coll_11150.log 273090 Log file, useful mostly for debugging
Tune-1115-JustFaceTheMusic.abc 1907 ABC music file with the extracted tune(s)
Tune-1115-JustFaceTheMusic.ps 45863 PostScript
Tune-1115-JustFaceTheMusic.txt 1907 Plain-text file with the extracted tune(s)
Tune-1115-get.log 4969 Log file, useful mostly for debugging
These files should be available for 24 hours.