pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-35246-rbbop.ps) >>/Users/jc/w/tmp/Tune-35246-get.log 2>&1" returned status 256
http://www.srcf.ucam.org/round/files/rbbop.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-35246-get.log 4103 Log file, useful mostly for debugging
Tune-35246-rbbop.abc 302 ABC music file with the extracted tune(s)
Tune-35246-rbbop.ps 33557 PostScript
Tune-35246-rbbop.txt 302 Plain-text file with the extracted tune(s)
These files should be available for 24 hours.