pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-3221-tune-420-hullican-jig.ps) >>/Users/jc/w/tmp/Tune-3221-get.log 2>&1" returned status 256
http://lesters-tune-a-day.blogspot.co.uk/2015/06/tune-420-hullican-jig.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-3221-get.log 6200 Log file, useful mostly for debugging
Tune-3221-tune-420-hullican-jig.abc 1659 ABC music file with the extracted tune(s)
Tune-3221-tune-420-hullican-jig.ps 53140 PostScript
Tune-3221-tune-420-hullican-jig.txt 1659 Plain-text file with the extracted tune(s)
These files should be available for 24 hours.