pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-2627-Kerr_MM1-V2.ps) >>/Users/jc/w/tmp/Tune-2627-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/Kerr/MM1/Kerr_MM1-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_26272.log 65264 Log file, useful mostly for debugging
Find_26273.log 1352 Log file, useful mostly for debugging
Tune-2627-Kerr_MM1-V2.abc 443 ABC music file with the extracted tune(s)
Tune-2627-Kerr_MM1-V2.ps 36991 PostScript
Tune-2627-Kerr_MM1-V2.txt 443 Plain-text file with the extracted tune(s)
Tune-2627-get.log 4304 Log file, useful mostly for debugging
Tune-26271-get.log 4062 Log file, useful mostly for debugging
These files should be available for 24 hours.