pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-9031-1781_Skillern.ps) >>/Users/jc/w/tmp/Tune-9031-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/dfty/1781_Skillern.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_90313.log 291355 Log file, useful mostly for debugging
Tune-9031-1781_Skillern.abc 17775 ABC music file with the extracted tune(s)
Tune-9031-1781_Skillern.ps 130228 PostScript
Tune-9031-1781_Skillern.txt 17775 Plain-text file with the extracted tune(s)
Tune-9031-get.log 17064 Log file, useful mostly for debugging
Tune-90310-get.log 1404 Log file, useful mostly for debugging
Tune-90317-get.log 1404 Log file, useful mostly for debugging
These files should be available for 24 hours.