pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-28095-hnvals0.ps) >>/Users/jc/w/tmp/Tune-28095-get.log 2>&1" returned status 256
http://norbeck.nu/abc/s/hnvals0.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-28095-get.log 4025 Log file, useful mostly for debugging
Tune-28095-hnvals0.abc 386 ABC music file with the extracted tune(s)
Tune-28095-hnvals0.ps 35051 PostScript
Tune-28095-hnvals0.txt 386 Plain-text file with the extracted tune(s)
These files should be available for 24 hours.