pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-91876-brighton-camp-bryan-1.ps) >>/Users/jc/w/tmp/Tune-91876-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/abc/mirror/musicaviva.com/england/brighton-camp-bryan/brighton-camp-bryan-1.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-91876-brighton-camp-bryan-1.abc 675 ABC music file with the extracted tune(s)
Tune-91876-brighton-camp-bryan-1.ps 34272 PostScript
Tune-91876-brighton-camp-bryan-1.txt 675 Plain-text file with the extracted tune(s)
Tune-91876-get.log 5513 Log file, useful mostly for debugging
These files should be available for 24 hours.