pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-71875-Programme.ps) >>/Users/jc/w/tmp/Tune-71875-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/abc/mirror/galouvielle.free.fr/Programme%202%20Catherine.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-71875-Programme.abc 477 ABC music file with the extracted tune(s)
Tune-71875-Programme.ps 32866 PostScript
Tune-71875-Programme.txt 477 Plain-text file with the extracted tune(s)
Tune-71875-get.log 11463 Log file, useful mostly for debugging
These files should be available for 24 hours.