pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-23794-KF_C.ps) >>/Users/jc/w/tmp/Tune-23794-get.log 2>&1" returned status 256
http://jjaquier.free.fr/midifiles/abc/abc/KF_C.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_23794.log 875 Log file, useful mostly for debugging
Tune-23794-KF_C.abc 940 ABC music file with the extracted tune(s)
Tune-23794-KF_C.ps 40423 PostScript
Tune-23794-KF_C.txt 940 Plain-text file with the extracted tune(s)
Tune-23794-get.log 4136 Log file, useful mostly for debugging
These files should be available for 24 hours.