pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-91663-j.ps) >>/Users/jc/w/tmp/Tune-91663-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/abc/mirror/redhawk.org/zouki/j.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-91663-get.log 11463 Log file, useful mostly for debugging
Tune-91663-j.abc 278 ABC music file with the extracted tune(s)
Tune-91663-j.ps 34169 PostScript
Tune-91663-j.txt 278 Plain-text file with the extracted tune(s)
These files should be available for 24 hours.