pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-17555-Bourree_14.ps) >>/Users/jc/w/tmp/Tune-17555-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/abc/bourree/Bourree_14.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_17555.log 303999 Log file, useful mostly for debugging
Tune-17555-Bourree_14.abc 313 ABC music file with the extracted tune(s)
Tune-17555-Bourree_14.ps 33684 PostScript
Tune-17555-Bourree_14.txt 313 Plain-text file with the extracted tune(s)
Tune-17555-get.log 4459 Log file, useful mostly for debugging
These files should be available for 24 hours.