pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-4583-ScotchMary.ps) >>/Users/jc/w/tmp/Tune-4583-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/abc/Contra/ScotchMary.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_45830.log 424834 Log file, useful mostly for debugging
Coll_45836.log 337720 Log file, useful mostly for debugging
Tune-4583-ScotchMary.abc 1634 ABC music file with the extracted tune(s)
Tune-4583-ScotchMary.ps 51188 PostScript
Tune-4583-ScotchMary.txt 1634 Plain-text file with the extracted tune(s)
Tune-4583-get.log 5960 Log file, useful mostly for debugging
Tune-45834-get.log 11979 Log file, useful mostly for debugging
Tune-45835-get.log 4343 Log file, useful mostly for debugging
Tune-45839-get.log 4314 Log file, useful mostly for debugging
These files should be available for 24 hours.