pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-74878-hnr6.ps) >>/Users/jc/w/tmp/Tune-74878-get.log 2>&1" returned status 256
http://jjaquier.free.fr/midifiles/abc/abc/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
Tune-74878-get.log 8053 Log file, useful mostly for debugging
Tune-74878-hnr6.abc 285 ABC music file with the extracted tune(s)
Tune-74878-hnr6.ps 35161 PostScript
Tune-74878-hnr6.txt 285 Plain-text file with the extracted tune(s)
These files should be available for 24 hours.