pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-9517-Kerr_MM3-V1.ps) >>/Users/jc/w/tmp/Tune-9517-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/Kerr/MM3/Kerr_MM3-V1.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
Find_95171.log 1439 Log file, useful mostly for debugging
Find_95173.log 1403 Log file, useful mostly for debugging
Find_95176.log 1479 Log file, useful mostly for debugging
Form_95170.log 863 Log file, useful mostly for debugging
Form_95172.log 849 Log file, useful mostly for debugging
Tune-9517-Kerr_MM3-V1.abc 386 ABC music file with the extracted tune(s)
Tune-9517-Kerr_MM3-V1.ps 35203 PostScript
Tune-9517-Kerr_MM3-V1.txt 386 Plain-text file with the extracted tune(s)
Tune-9517-get.log 4358 Log file, useful mostly for debugging
Tune-95172-get.log 4673 Log file, useful mostly for debugging
Tune-95173-get.log 3118 Log file, useful mostly for debugging
Tune-95175-get.log 7880 Log file, useful mostly for debugging
Tune-95177-get.log 5815 Log file, useful mostly for debugging
Tune-95178-get.log 15422 Log file, useful mostly for debugging
Tune-95179-get.log 4581 Log file, useful mostly for debugging
These files should be available for 24 hours.