pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-72251-JeanWhite_HRJCD.ps) >>/Users/jc/w/tmp/Tune-72251-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/JeanWhite_HRJCD.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_72251.log 509130 Log file, useful mostly for debugging
Tune-72251-JeanWhite_HRJCD.abc 66203 ABC music file with the extracted tune(s)
Tune-72251-JeanWhite_HRJCD.ps 610880 PostScript
Tune-72251-JeanWhite_HRJCD.txt 66203 Plain-text file with the extracted tune(s)
Tune-72251-get.log 54955 Log file, useful mostly for debugging
These files should be available for 24 hours.