pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-24435-tune-154-bobby-shafto.ps) >>/Users/jc/w/tmp/Tune-24435-get.log 2>&1" returned status 256
http://lesters-tune-a-day.blogspot.co.uk/2013/01/tune-154-bobby-shafto.html

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-24435-get.log 4526 Log file, useful mostly for debugging
Tune-24435-tune-154-bobby-shafto.abc 213 ABC music file with the extracted tune(s)
Tune-24435-tune-154-bobby-shafto.ps 33532 PostScript
Tune-24435-tune-154-bobby-shafto.txt 213 Plain-text file with the extracted tune(s)
These files should be available for 24 hours.