pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-99026-SilverGrey.ps) >>/Users/jc/w/tmp/Tune-99026-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/Scotland/SilverGrey.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-99026-Goodwins_Maggot.abc 1042 ABC music file with the extracted tune(s)
Tune-99026-Goodwins_Maggot.ps 34594 PostScript
Tune-99026-Goodwins_Maggot.txt 1042 Plain-text file with the extracted tune(s)
Tune-99026-SilverGrey.abc 2384 ABC music file with the extracted tune(s)
Tune-99026-SilverGrey.ps 54986 PostScript
Tune-99026-SilverGrey.txt 2384 Plain-text file with the extracted tune(s)
Tune-99026-get.log 9349 Log file, useful mostly for debugging
These files should be available for 24 hours.