pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-813-HAA_HAP.ps) >>/Users/jc/w/tmp/Tune-813-get.log 2>&1" returned status 256
http://www.ibiblio.org/fiddlers/HAA_HAP.htm

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-813-HAA_HAP.abc 768 ABC music file with the extracted tune(s)
Tune-813-HAA_HAP.ps 39521 PostScript
Tune-813-HAA_HAP.txt 768 Plain-text file with the extracted tune(s)
Tune-813-get.log 7175 Log file, useful mostly for debugging
These files should be available for 24 hours.