pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-5429-Lord_Mayo-Gdor-12-3.ps) >>/Users/jc/w/tmp/Tune-5429-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/ONeills/air/Lord_Mayo-Gdor-12-3.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_54293.log 1283451 Log file, useful mostly for debugging
Tune-5429-Lord_Mayo-Gdor-12-3.abc 568 ABC music file with the extracted tune(s)
Tune-5429-Lord_Mayo-Gdor-12-3.ps 37372 PostScript
Tune-5429-Lord_Mayo-Gdor-12-3.txt 568 Plain-text file with the extracted tune(s)
Tune-5429-get.log 4648 Log file, useful mostly for debugging
Tune-54295-get.log 4070 Log file, useful mostly for debugging
Tune-54297-get.log 1391 Log file, useful mostly for debugging
These files should be available for 24 hours.