pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-8556-tunes.ps) >>/Users/jc/w/tmp/Tune-8556-get.log 2>&1" returned status 256
http://roaringjelly.org/~jc/music/book/Pringle/tunes.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_85567.log 5767 Log file, useful mostly for debugging
Tune-8556-get.log 71716 Log file, useful mostly for debugging
Tune-8556-tunes.abc 80005 ABC music file with the extracted tune(s)
Tune-8556-tunes.ps 928194 PostScript
Tune-8556-tunes.txt 80005 Plain-text file with the extracted tune(s)
Tune-85561-get.log 3222 Log file, useful mostly for debugging
Tune-85565-get.log 5373 Log file, useful mostly for debugging
Tune-85566-get.log 4494 Log file, useful mostly for debugging
Tune-85569-Lord_Hows_Jigg_THO4_115-001.svg 14800 Scalable Vector Graphics format
Tune-85569-Lord_Hows_Jigg_THO4_115.abc 462 ABC music file with the extracted tune(s)
Tune-85569-Lord_Hows_Jigg_THO4_115.txt 462 Plain-text file with the extracted tune(s)
Tune-85569-get.log 4406 Log file, useful mostly for debugging
These files should be available for 24 hours.