pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-85973-3153.ps) >>/Users/jc/w/tmp/Tune-85973-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/Gow/CR12/3153=Johnny_Pringle.abc2.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-85973-3153.abc 947 ABC music file with the extracted tune(s)
Tune-85973-3153.ps 40183 PostScript
Tune-85973-3153.txt 947 Plain-text file with the extracted tune(s)
Tune-85973-get.log 4876 Log file, useful mostly for debugging
These files should be available for 24 hours.