pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-82978-JohnMcAlpin1.ps) >>/Users/jc/w/tmp/Tune-82978-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/Scotland/JohnMcAlpin1.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_82978.log 558825 Log file, useful mostly for debugging
Tune-82978-JohnMcAlpin1.abc 2335 ABC music file with the extracted tune(s)
Tune-82978-JohnMcAlpin1.ps 54993 PostScript
Tune-82978-JohnMcAlpin1.txt 2335 Plain-text file with the extracted tune(s)
Tune-82978-get.log 4874 Log file, useful mostly for debugging
These files should be available for 24 hours.