pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-5742-HighlandWelcome.ps) >>/Users/jc/w/tmp/Tune-5742-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/Scotland/HighlandWelcome.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_57424.log 282925 Log file, useful mostly for debugging
Coll_57427.log 96664 Log file, useful mostly for debugging
Coll_57428.log 1581820 Log file, useful mostly for debugging
Tune-5742-HighlandWelcome.abc 2090 ABC music file with the extracted tune(s)
Tune-5742-HighlandWelcome.ps 48577 PostScript
Tune-5742-HighlandWelcome.txt 2090 Plain-text file with the extracted tune(s)
Tune-5742-get.log 4959 Log file, useful mostly for debugging
These files should be available for 24 hours.