pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-7832-1751_.ps) >>/Users/jc/w/tmp/Tune-7832-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/BostonCollection/1751_.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-7832-1751_.abc 64 ABC music file with the extracted tune(s)
Tune-7832-1751_.ps 6 PostScript
Tune-7832-1751_.txt 64 Plain-text file with the extracted tune(s)
Tune-7832-get.log 3883 Log file, useful mostly for debugging
Tune-78321-get.log 1402 Log file, useful mostly for debugging
Tune-78323-get.log 1510 Log file, useful mostly for debugging
Tune-78325-get.log 1402 Log file, useful mostly for debugging
Tune-78329-get.log 1452 Log file, useful mostly for debugging
These files should be available for 24 hours.