pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-31131-hnwaltz0.ps) >>/Users/jc/w/tmp/Tune-31131-get.log 2>&1" returned status 256
http://jjaquier.free.fr/midifiles/abc/hnwaltz0.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-31131-get.log 4134 Log file, useful mostly for debugging
Tune-31131-hnwaltz0.abc 260 ABC music file with the extracted tune(s)
Tune-31131-hnwaltz0.ps 34841 PostScript
Tune-31131-hnwaltz0.txt 260 Plain-text file with the extracted tune(s)
These files should be available for 24 hours.