pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-57695-137014.ps) >>/Users/jc/w/tmp/Tune-57695-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/Kerr/MM1/137014=the_Widow_Magee-V2.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-57695-137014.abc 555 ABC music file with the extracted tune(s)
Tune-57695-137014.ps 33948 PostScript
Tune-57695-137014.txt 555 Plain-text file with the extracted tune(s)
Tune-57695-get.log 4637 Log file, useful mostly for debugging
These files should be available for 24 hours.