pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-4006-ACanonbieCeilidh.ps) >>/Users/jc/w/tmp/Tune-4006-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/Scotland/ACanonbieCeilidh.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_40064.log 280115 Log file, useful mostly for debugging
Coll_40067.log 564445 Log file, useful mostly for debugging
Tune-4006-ACanonbieCeilidh.abc 1967 ABC music file with the extracted tune(s)
Tune-4006-ACanonbieCeilidh.ps 48844 PostScript
Tune-4006-ACanonbieCeilidh.txt 1967 Plain-text file with the extracted tune(s)
Tune-4006-get.log 4985 Log file, useful mostly for debugging
These files should be available for 24 hours.