pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-28663-VCB1.ps) >>/Users/jc/w/tmp/Tune-28663-get.log 2>&1" returned status 256
http://jjaquier.free.fr/midifiles/abc/abc/VCB1.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-28663-VCB1.abc 257 ABC music file with the extracted tune(s)
Tune-28663-VCB1.ps 35433 PostScript
Tune-28663-VCB1.txt 257 Plain-text file with the extracted tune(s)
Tune-28663-get.log 4358 Log file, useful mostly for debugging
These files should be available for 24 hours.