pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-6178-xmas.ps) >>/Users/jc/w/tmp/Tune-6178-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/Scotland/xmas.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_61788.log 280115 Log file, useful mostly for debugging
Coll_61789.log 1083380 Log file, useful mostly for debugging
Find_61784.log 1519 Log file, useful mostly for debugging
Tune-6178-get.log 37434 Log file, useful mostly for debugging
Tune-6178-xmas.abc 21110 ABC music file with the extracted tune(s)
Tune-6178-xmas.ps 194461 PostScript
Tune-6178-xmas.txt 21110 Plain-text file with the extracted tune(s)
These files should be available for 24 hours.