pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-7994-Kerr_MM2-V2.ps) >>/Users/jc/w/tmp/Tune-7994-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/Kerr/MM2/Kerr_MM2-V2.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_79949.log 257739 Log file, useful mostly for debugging
Find_79945.log 1475 Log file, useful mostly for debugging
Tune-7994-Kerr_MM2-V2.abc 368 ABC music file with the extracted tune(s)
Tune-7994-Kerr_MM2-V2.ps 35191 PostScript
Tune-7994-Kerr_MM2-V2.txt 368 Plain-text file with the extracted tune(s)
Tune-7994-get.log 4365 Log file, useful mostly for debugging
Tune-79945-get.log 2482 Log file, useful mostly for debugging
These files should be available for 24 hours.