pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-92189-3092.ps) >>/Users/jc/w/tmp/Tune-92189-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/Gow/CR12/3092=Shes_fair_and_Fause.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-92189-3092.abc 1068 ABC music file with the extracted tune(s)
Tune-92189-3092.ps 39890 PostScript
Tune-92189-3092.txt 1068 Plain-text file with the extracted tune(s)
Tune-92189-get.log 4954 Log file, useful mostly for debugging
These files should be available for 24 hours.