pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-72826-Set04.ps) >>/Users/jc/w/tmp/Tune-72826-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/Scotland/Set04.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_72826.log 268875 Log file, useful mostly for debugging
Tune-72826-Set04.abc 2080 ABC music file with the extracted tune(s)
Tune-72826-Set04.ps 48116 PostScript
Tune-72826-Set04.txt 2080 Plain-text file with the extracted tune(s)
Tune-72826-get.log 4268 Log file, useful mostly for debugging
These files should be available for 24 hours.