pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-99435-Bourree_25.ps) >>/Users/jc/w/tmp/Tune-99435-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/abc/bourree/Bourree_25.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_99435.log 466984 Log file, useful mostly for debugging
Tune-99435-Bourree_25.abc 284 ABC music file with the extracted tune(s)
Tune-99435-Bourree_25.ps 33786 PostScript
Tune-99435-Bourree_25.txt 284 Plain-text file with the extracted tune(s)
Tune-99435-get.log 8743 Log file, useful mostly for debugging
These files should be available for 24 hours.