pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-3931-CraigieBurnWood.ps) >>/Users/jc/w/tmp/Tune-3931-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/Scotland/CraigieBurnWood.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_3931.log 280115 Log file, useful mostly for debugging
Coll_39312.log 277305 Log file, useful mostly for debugging
Coll_39315.log 281520 Log file, useful mostly for debugging
Tune-3931-CraigieBurnWood.abc 1122 ABC music file with the extracted tune(s)
Tune-3931-CraigieBurnWood.ps 39792 PostScript
Tune-3931-CraigieBurnWood.txt 1122 Plain-text file with the extracted tune(s)
Tune-3931-get.log 4942 Log file, useful mostly for debugging
These files should be available for 24 hours.