pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-4111-GoodHeartedGlasgowXmas.ps) >>/Users/jc/w/tmp/Tune-4111-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/Scotland/GoodHeartedGlasgowXmas.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_41115.log 281520 Log file, useful mostly for debugging
Tune-4111-GoodHeartedGlasgowXmas.abc 3431 ABC music file with the extracted tune(s)
Tune-4111-GoodHeartedGlasgowXmas.ps 48292 PostScript
Tune-4111-GoodHeartedGlasgowXmas.txt 3431 Plain-text file with the extracted tune(s)
Tune-4111-get.log 5183 Log file, useful mostly for debugging
These files should be available for 24 hours.