pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-78943-learnM.ps) >>/Users/jc/w/tmp/Tune-78943-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/abc/Contra/learnM.abc

Error exit status 256; here are some files to check:
[P=tuneget V=1/1 B=0 scale=0.70 512x512 PNG]
filesizedescription
Tune-78943-get.log 13402 Log file, useful mostly for debugging
Tune-78943-learnM.abc 8693 ABC music file with the extracted tune(s)
Tune-78943-learnM.ps 100948 PostScript
Tune-78943-learnM.txt 8693 Plain-text file with the extracted tune(s)
These files should be available for 24 hours.