pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-63879-rbbop.ps) >>/Users/jc/w/tmp/Tune-63879-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
Form_63879.log 1674 Log file, useful mostly for debugging
Tune-63879-get.log 4255 Log file, useful mostly for debugging
Tune-63879-rbbop.abc 424 ABC music file with the extracted tune(s)
Tune-63879-rbbop.ps 35946 PostScript
Tune-63879-rbbop.txt 424 Plain-text file with the extracted tune(s)
These files should be available for 24 hours.