pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-7011-21271_DUNFERMLINE_RACES.ps) >>/Users/jc/w/tmp/Tune-7011-get.log 2>&1" returned status 256
http://roaringjelly.org/~jc/music/book/Kohlers/21271_DUNFERMLINE_RACES.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_70112.log 260446 Log file, useful mostly for debugging
Coll_70118.log 261851 Log file, useful mostly for debugging
Form_70110.log 893 Log file, useful mostly for debugging
Form_70112.log 850 Log file, useful mostly for debugging
Form_70115.log 1658 Log file, useful mostly for debugging
Form_70116.log 1936 Log file, useful mostly for debugging
Tune-7011-21271_DUNFERMLINE_RACES.abc 538 ABC music file with the extracted tune(s)
Tune-7011-21271_DUNFERMLINE_RACES.ps 35880 PostScript
Tune-7011-21271_DUNFERMLINE_RACES.txt 538 Plain-text file with the extracted tune(s)
Tune-7011-get.log 8343 Log file, useful mostly for debugging
Tune-70114-get.log 3586 Log file, useful mostly for debugging
Tune-70119-get.log 12433 Log file, useful mostly for debugging
These files should be available for 24 hours.