pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-41042-391_Red_Cross_Knight.ps) >>/Users/jc/w/tmp/Tune-41042-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/DftY/1800/Preston/391_Red_Cross_Knight.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-41042-391_Red_Cross_Knight.abc 807 ABC music file with the extracted tune(s)
Tune-41042-391_Red_Cross_Knight.ps 33000 PostScript
Tune-41042-391_Red_Cross_Knight.txt 807 Plain-text file with the extracted tune(s)
Tune-41042-get.log 13981 Log file, useful mostly for debugging
These files should be available for 24 hours.