pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-22890-Aird-v3.ps) >>/Users/jc/w/tmp/Tune-22890-get.log 2>&1" returned status 256
http://www.campin.me.uk/Aird/Aird-v3.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-22890-Aird-v3.abc 371 ABC music file with the extracted tune(s)
Tune-22890-Aird-v3.ps 35477 PostScript
Tune-22890-Aird-v3.txt 371 Plain-text file with the extracted tune(s)
Tune-22890-get.log 4309 Log file, useful mostly for debugging
These files should be available for 24 hours.