Mismatch: X:66 doesn't match requested X:67
X:67 not found in http://john-chambers.us/~jc/music/abc/demo/Tunes/Ball.abc
pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-39461-Ball.ps) >>/Users/jc/w/tmp/Tune-39461-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/abc/demo/Tunes/Ball.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-39461-Ball.abc 0 ABC music file with the extracted tune(s)
Tune-39461-Ball.ps 6 PostScript
Tune-39461-Ball.txt 0 Plain-text file with the extracted tune(s)
Tune-39461-get.log 21057 Log file, useful mostly for debugging
These files should be available for 24 hours.