pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-16399-21171_.ps) >>/Users/jc/w/tmp/Tune-16399-get.log 2>&1" returned status 256
http://roaringjelly.org/~jc/music/book/ERM/21171_.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-16399-21171_.abc 50 ABC music file with the extracted tune(s)
Tune-16399-21171_.ps 6 PostScript
Tune-16399-21171_.txt 50 Plain-text file with the extracted tune(s)
Tune-16399-4332_Appin_House.abc 1644 ABC music file with the extracted tune(s)
Tune-16399-4332_Appin_House.pdf 37246 Portable Data Format
Tune-16399-4332_Appin_House.ps 46549 PostScript
Tune-16399-4332_Appin_House.txt 1644 Plain-text file with the extracted tune(s)
Tune-16399-get.log 23500 Log file, useful mostly for debugging
These files should be available for 24 hours.