pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-60650-section_.ps) >>/Users/jc/w/tmp/Tune-60650-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/Kerr/MM1/section_.abc

Error exit status 256; here are some files to check:
[P=tuneget V=1/1 B=0 scale=0.70 512x512 PNG]
filesizedescription
Tune-60650-get.log 3967 Log file, useful mostly for debugging
Tune-60650-section_.abc 27 ABC music file with the extracted tune(s)
Tune-60650-section_.ps 30640 PostScript
Tune-60650-section_.txt 27 Plain-text file with the extracted tune(s)
These files should be available for 24 hours.