pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-1862-Kerr_MM3-V1.ps) >>/Users/jc/w/tmp/Tune-1862-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
Coll_1862.log 69314 Log file, useful mostly for debugging
Coll_18621.log 127828 Log file, useful mostly for debugging
Tune-1862-Kerr_MM3-V1.abc 430 ABC music file with the extracted tune(s)
Tune-1862-Kerr_MM3-V1.ps 34809 PostScript
Tune-1862-Kerr_MM3-V1.txt 430 Plain-text file with the extracted tune(s)
Tune-1862-get.log 4235 Log file, useful mostly for debugging
Tune-18623-get.log 1420 Log file, useful mostly for debugging
These files should be available for 24 hours.