pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-7334-20111_.ps) >>/Users/jc/w/tmp/Tune-7334-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/EliasHowe/MusiciansCompanionP2/20111_.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_73346.log 131196 Log file, useful mostly for debugging
Tune-7334-20111_.abc 33 ABC music file with the extracted tune(s)
Tune-7334-20111_.ps 6 PostScript
Tune-7334-20111_.txt 33 Plain-text file with the extracted tune(s)
Tune-7334-get.log 9521 Log file, useful mostly for debugging
Tune-73346-get.log 6172 Log file, useful mostly for debugging
Tune-73348-get.log 19120 Log file, useful mostly for debugging
These files should be available for 24 hours.