pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-45501-hnr0.ps) >>/Users/jc/w/tmp/Tune-45501-get.log 2>&1" returned status 256
http://www.norbeck.nu/abc/i/hnr0.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-45501-get.log 38481 Log file, useful mostly for debugging
Tune-45501-hnr0.abc 394 ABC music file with the extracted tune(s)
Tune-45501-hnr0.ps 34662 PostScript
Tune-45501-hnr0.txt 394 Plain-text file with the extracted tune(s)
These files should be available for 24 hours.