pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-53934-WestsHornpipe.ps) >>/Users/jc/w/tmp/Tune-53934-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/Scotland/WestsHornpipe.abc

Error exit status 256; here are some files to check:
[P=tuneget V=1/1 B=0 scale=0.70 512x512 PNG]
filesizedescription
Tune-53934-VeDavid_Gm.abc 1663 ABC music file with the extracted tune(s)
Tune-53934-VeDavid_Gm.ps 42285 PostScript
Tune-53934-VeDavid_Gm.txt 1663 Plain-text file with the extracted tune(s)
Tune-53934-WestsHornpipe.abc 1333 ABC music file with the extracted tune(s)
Tune-53934-WestsHornpipe.ps 39796 PostScript
Tune-53934-WestsHornpipe.txt 1333 Plain-text file with the extracted tune(s)
Tune-53934-get.log 9650 Log file, useful mostly for debugging
These files should be available for 24 hours.