pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-55550-MrsStewartsJig1.ps) >>/Users/jc/w/tmp/Tune-55550-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/Scotland/MrsStewartsJig1.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_55550.log 1324401 Log file, useful mostly for debugging
Tune-55550-MrsStewartsJig1.abc 1555 ABC music file with the extracted tune(s)
Tune-55550-MrsStewartsJig1.ps 45824 PostScript
Tune-55550-MrsStewartsJig1.txt 1555 Plain-text file with the extracted tune(s)
Tune-55550-get.log 4960 Log file, useful mostly for debugging
These files should be available for 24 hours.