pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-10506-2008_Mrs_Forbes.ps) >>/Users/jc/w/tmp/Tune-10506-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/Kerr/MM2/2008_Mrs_Forbes.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_10506.log 393920 Log file, useful mostly for debugging
Tune-10506-2008_Mrs_Forbes.abc 367 ABC music file with the extracted tune(s)
Tune-10506-2008_Mrs_Forbes.ps 33685 PostScript
Tune-10506-2008_Mrs_Forbes.txt 367 Plain-text file with the extracted tune(s)
Tune-10506-get.log 4598 Log file, useful mostly for debugging
These files should be available for 24 hours.