Mismatch: X:18892 doesn't match requested X:18896
Mismatch: X:18893 doesn't match requested X:18896
Mismatch: X:18894 doesn't match requested X:18896
Mismatch: X:18895 doesn't match requested X:18896
pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-44088-w.ps) >>/Users/jc/w/tmp/Tune-44088-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/abc/mirror/terra.es/personal8/niltoni/w.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-44088-get.log 127086 Log file, useful mostly for debugging
Tune-44088-w.abc 531 ABC music file with the extracted tune(s)
Tune-44088-w.ps 35094 PostScript
Tune-44088-w.txt 531 Plain-text file with the extracted tune(s)
These files should be available for 24 hours.