pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-39927-CW03.ps) >>/Users/jc/w/tmp/Tune-39927-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/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_39927.log 592930 Log file, useful mostly for debugging
Tune-39927-CW03.abc 3397 ABC music file with the extracted tune(s)
Tune-39927-CW03.ps 45982 PostScript
Tune-39927-CW03.txt 3397 Plain-text file with the extracted tune(s)
Tune-39927-get.log 4263 Log file, useful mostly for debugging
These files should be available for 24 hours.