pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-7746-PolharrowBurn.ps) >>/Users/jc/w/tmp/Tune-7746-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/Scotland/PolharrowBurn.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_77464.log 282925 Log file, useful mostly for debugging
Tune-7746-PolharrowBurn.abc 2857 ABC music file with the extracted tune(s)
Tune-7746-PolharrowBurn.ps 45258 PostScript
Tune-7746-PolharrowBurn.txt 2857 Plain-text file with the extracted tune(s)
Tune-7746-get.log 4885 Log file, useful mostly for debugging
Tune-77460-Snoa00.abc 1978 ABC music file with the extracted tune(s)
Tune-77460-Snoa00.gif 0 Graphics Interchange Format, the proprietary scan-line picture format
Tune-77460-Snoa00.ps 53623 PostScript
Tune-77460-Snoa00.txt 1978 Plain-text file with the extracted tune(s)
Tune-77460-get.log 6569 Log file, useful mostly for debugging
Tune-77464-get.log 1462 Log file, useful mostly for debugging
Tune-77469-get.log 2913 Log file, useful mostly for debugging
These files should be available for 24 hours.