pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-92851-Kohlers1.ps) >>/Users/jc/w/tmp/Tune-92851-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/Kohlers/Kohlers1.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
Coll_92851.log 136152 Log file, useful mostly for debugging
Form_92851.log 488 Log file, useful mostly for debugging
Tune-92851-Kohlers1.abc 798 ABC music file with the extracted tune(s)
Tune-92851-Kohlers1.ps 42419 PostScript
Tune-92851-Kohlers1.txt 798 Plain-text file with the extracted tune(s)
Tune-92851-get.log 4309 Log file, useful mostly for debugging
These files should be available for 24 hours.