pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-46249-_.ps) >>/Users/jc/w/tmp/Tune-46249-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/EliasHowe/MusiciansCompanionP1/_.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_46249.log 719419 Log file, useful mostly for debugging
Tune-46249-_.abc 33 ABC music file with the extracted tune(s)
Tune-46249-_.ps 6 PostScript
Tune-46249-_.txt 33 Plain-text file with the extracted tune(s)
Tune-46249-get.log 8882 Log file, useful mostly for debugging
These files should be available for 24 hours.