pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-1905-Kerr_MM1-V2.ps) >>/Users/jc/w/tmp/Tune-1905-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_19057.log 1095531 Log file, useful mostly for debugging
Find_19053.log 1627 Log file, useful mostly for debugging
Tune-1905-Kerr_MM1-V2.abc 370 ABC music file with the extracted tune(s)
Tune-1905-Kerr_MM1-V2.ps 35509 PostScript
Tune-1905-Kerr_MM1-V2.txt 370 Plain-text file with the extracted tune(s)
Tune-1905-get.log 4460 Log file, useful mostly for debugging
Tune-19058-get.log 4409 Log file, useful mostly for debugging
These files should be available for 24 hours.