Mismatch: X:3196 doesn't match requested X:3198
pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-65783-c.ps) >>/Users/jc/w/tmp/Tune-65783-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/abc/mirror/terra.es/personal8/niltoni/c.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-65783-c.abc 397 ABC music file with the extracted tune(s)
Tune-65783-c.ps 35509 PostScript
Tune-65783-c.txt 397 Plain-text file with the extracted tune(s)
Tune-65783-get.log 293837 Log file, useful mostly for debugging
These files should be available for 24 hours.