Mismatch: X:15138 doesn't match requested X:15137
Mismatch: X:15139 doesn't match requested X:15137
Mismatch: X:15253 doesn't match requested X:15137
pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-55497-s.ps) >>/Users/jc/w/tmp/Tune-55497-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/abc/mirror/terra.es/personal8/niltoni/s.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-55497-get.log 353184 Log file, useful mostly for debugging
Tune-55497-s.abc 376 ABC music file with the extracted tune(s)
Tune-55497-s.ps 35557 PostScript
Tune-55497-s.txt 376 Plain-text file with the extracted tune(s)
These files should be available for 24 hours.