pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-43707-learnW.ps) >>/Users/jc/w/tmp/Tune-43707-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/abc/Contra/learnW.abc

Error exit status 256; here are some files to check:
[P=get.cgi V=1/1 B=0 scale=0.60 512x512 PNG]
filesizedescription
Tune-43707-get.log 8237 Log file, useful mostly for debugging
Tune-43707-learnW.abc 408 ABC music file with the extracted tune(s)
Tune-43707-learnW.ps 34663 PostScript
Tune-43707-learnW.txt 408 Plain-text file with the extracted tune(s)
These files should be available for 24 hours.