pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-44077-alltunes1.ps) >>/Users/jc/w/tmp/Tune-44077-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/WilliamCampbell/10thBook/alltunes1.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-44077-alltunes1.abc 38010 ABC music file with the extracted tune(s)
Tune-44077-alltunes1.ps 269935 PostScript
Tune-44077-alltunes1.txt 38010 Plain-text file with the extracted tune(s)
Tune-44077-get.log 38273 Log file, useful mostly for debugging
These files should be available for 24 hours.