pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-7984-Fire_Skilling.ps) >>/Users/jc/w/tmp/Tune-7984-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/abc/shottish/Fire_Skilling.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_79840.log 537230 Log file, useful mostly for debugging
Coll_79841.log 128507 Log file, useful mostly for debugging
Coll_79849.log 266064 Log file, useful mostly for debugging
Tune-7984-Fire_Skilling.abc 455 ABC music file with the extracted tune(s)
Tune-7984-Fire_Skilling.ps 35028 PostScript
Tune-7984-Fire_Skilling.txt 455 Plain-text file with the extracted tune(s)
Tune-7984-get.log 4472 Log file, useful mostly for debugging
These files should be available for 24 hours.