pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-5554-Clansman.ps) >>/Users/jc/w/tmp/Tune-5554-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/Scotland/Clansman.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_55540.log 281520 Log file, useful mostly for debugging
Coll_55542.log 284330 Log file, useful mostly for debugging
Coll_55549.log 100565 Log file, useful mostly for debugging
Tune-5554-Clansman.abc 1839 ABC music file with the extracted tune(s)
Tune-5554-Clansman.ps 46752 PostScript
Tune-5554-Clansman.txt 1839 Plain-text file with the extracted tune(s)
Tune-5554-get.log 4745 Log file, useful mostly for debugging
These files should be available for 24 hours.