pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-9390-hnr6.ps) >>/Users/jc/w/tmp/Tune-9390-get.log 2>&1" returned status 256
http://www.norbeck.nu/abc/i/hnr6.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
Form_93904.log 752 Log file, useful mostly for debugging
Tune-9390-get.log 3896 Log file, useful mostly for debugging
Tune-9390-hnr6.abc 330 ABC music file with the extracted tune(s)
Tune-9390-hnr6.ps 35314 PostScript
Tune-9390-hnr6.txt 330 Plain-text file with the extracted tune(s)
Tune-93901-get.log 3010 Log file, useful mostly for debugging
Tune-93908-get.log 41227 Log file, useful mostly for debugging
These files should be available for 24 hours.