pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-13995-HuntlyCastle0.ps) >>/Users/jc/w/tmp/Tune-13995-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/Scotland/HuntlyCastle0.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_13995.log 676329 Log file, useful mostly for debugging
Tune-13995-HuntlyCastle0.abc 1751 ABC music file with the extracted tune(s)
Tune-13995-HuntlyCastle0.ps 43167 PostScript
Tune-13995-HuntlyCastle0.txt 1751 Plain-text file with the extracted tune(s)
Tune-13995-get.log 4885 Log file, useful mostly for debugging
These files should be available for 24 hours.