pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-546-CW03.ps) >>/Users/jc/w/tmp/Tune-546-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/abc/Contra/CW03.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_5460.log 252253 Log file, useful mostly for debugging
Coll_54607.log 135711 Log file, useful mostly for debugging
Coll_54608.log 323670 Log file, useful mostly for debugging
Coll_5461.log 391110 Log file, useful mostly for debugging
Coll_54630.log 322265 Log file, useful mostly for debugging
Coll_54643.log 326480 Log file, useful mostly for debugging
Coll_54669.log 325075 Log file, useful mostly for debugging
Coll_54680.log 326480 Log file, useful mostly for debugging
Coll_54692.log 320860 Log file, useful mostly for debugging
Tune-546-CW03.abc 3407 ABC music file with the extracted tune(s)
Tune-546-CW03.ps 45980 PostScript
Tune-546-CW03.txt 3407 Plain-text file with the extracted tune(s)
Tune-546-get.log 4317 Log file, useful mostly for debugging
Tune-54601-get.log 5090 Log file, useful mostly for debugging
Tune-54605-get.log 4058 Log file, useful mostly for debugging
Tune-54606-get.log 5690 Log file, useful mostly for debugging
Tune-54624-get.log 5728 Log file, useful mostly for debugging
Tune-54625-get.log 10105 Log file, useful mostly for debugging
Tune-54634-get.log 4434 Log file, useful mostly for debugging
Tune-54635-get.log 5553 Log file, useful mostly for debugging
Tune-54639-get.log 3200 Log file, useful mostly for debugging
Tune-54644-get.log 4515 Log file, useful mostly for debugging
Tune-54654-get.log 4281 Log file, useful mostly for debugging
Tune-54656-get.log 5165 Log file, useful mostly for debugging
Tune-54662-get.log 6499 Log file, useful mostly for debugging
Tune-54666-get.log 5683 Log file, useful mostly for debugging
Tune-54684-get.log 4131 Log file, useful mostly for debugging
Tune-54687-get.log 5595 Log file, useful mostly for debugging
Tune-54690-get.log 5437 Log file, useful mostly for debugging
Tune-54698-get.log 4243 Log file, useful mostly for debugging
These files should be available for 24 hours.