pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-2304-373_an_Air.ps) >>/Users/jc/w/tmp/Tune-2304-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/JohnTreat/GftF/373_an_Air.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-2304-373_an_Air.abc 715 ABC music file with the extracted tune(s)
Tune-2304-373_an_Air.ps 36723 PostScript
Tune-2304-373_an_Air.txt 715 Plain-text file with the extracted tune(s)
Tune-2304-get.log 4560 Log file, useful mostly for debugging
Tune-23040-get.log 8889 Log file, useful mostly for debugging
Tune-23041-get.log 12682 Log file, useful mostly for debugging
Tune-23043-get.log 4749 Log file, useful mostly for debugging
Tune-23045-get.log 5199 Log file, useful mostly for debugging
Tune-23046-get.log 3442 Log file, useful mostly for debugging
Tune-23047-get.log 8361 Log file, useful mostly for debugging
Tune-23049-get.log 15842 Log file, useful mostly for debugging
These files should be available for 24 hours.