pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-30979-stb.ps) >>/Users/jc/w/tmp/Tune-30979-get.log 2>&1" returned status 256
http://myweb.tiscali.co.uk/williamjfarmer/stb/stb.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-30979-get.log 4121 Log file, useful mostly for debugging
Tune-30979-stb.abc 246 ABC music file with the extracted tune(s)
Tune-30979-stb.ps 34883 PostScript
Tune-30979-stb.txt 246 Plain-text file with the extracted tune(s)
These files should be available for 24 hours.