pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-94504-High_Drive.ps) >>/Users/jc/w/tmp/Tune-94504-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/Scotland/High_Drive.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_94504.log 281520 Log file, useful mostly for debugging
Tune-94504-High_Drive.abc 1475 ABC music file with the extracted tune(s)
Tune-94504-High_Drive.ps 46850 PostScript
Tune-94504-High_Drive.txt 1475 Plain-text file with the extracted tune(s)
Tune-94504-get.log 4832 Log file, useful mostly for debugging
These files should be available for 24 hours.