pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-8294-20751_Butchers_Row.ps) >>/Users/jc/w/tmp/Tune-8294-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/EliasHowe/MusiciansCompanionP2/20751_Butchers_Row.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-8294-20751_Butchers_Row.abc 650 ABC music file with the extracted tune(s)
Tune-8294-20751_Butchers_Row.ps 34833 PostScript
Tune-8294-20751_Butchers_Row.txt 650 Plain-text file with the extracted tune(s)
Tune-8294-get.log 15259 Log file, useful mostly for debugging
Tune-82941-get.log 4433 Log file, useful mostly for debugging
Tune-82942-get.log 3504 Log file, useful mostly for debugging
Tune-82944-get.log 9929 Log file, useful mostly for debugging
Tune-82945-get.log 7650 Log file, useful mostly for debugging
Tune-82946-get.log 4334 Log file, useful mostly for debugging
Tune-82947-get.log 3624 Log file, useful mostly for debugging
Tune-82948-get.log 4258 Log file, useful mostly for debugging
These files should be available for 24 hours.