pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-70821-Roast_Beef_and_Brown_Beer.ps) >>/Users/jc/w/tmp/Tune-70821-get.log 2>&1" returned status 256
http://roaringjelly.org/~jc/music/book/JohnWalsh/Roast_Beef_and_Brown_Beer.abc

Error exit status 256; here are some files to check:
[P=tuneget V=1/1 B=0 scale=0.70 512x512 PNG]
filesizedescription
Form_70821.log 1159 Log file, useful mostly for debugging
Tune-70821-Roast_Beef_and_Brown_Beer.abc 1044 ABC music file with the extracted tune(s)
Tune-70821-Roast_Beef_and_Brown_Beer.ps 33053 PostScript
Tune-70821-Roast_Beef_and_Brown_Beer.txt 1044 Plain-text file with the extracted tune(s)
Tune-70821-get.log 4882 Log file, useful mostly for debugging
These files should be available for 24 hours.