pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-6036-002_Kelvin_Grove.ps) >>/Users/jc/w/tmp/Tune-6036-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/Chappell/002_Kelvin_Grove.abc

Error exit status 256; here are some files to check:
[get.cgi V=1/1 B=0 scale=0.55 512x512 PNG]
filesizedescription
Coll_6036.log 461209 Log file, useful mostly for debugging
Coll_60364.log 465411 Log file, useful mostly for debugging
Tune-6036-002_Kelvin_Grove.abc 494 ABC music file with the extracted tune(s)
Tune-6036-002_Kelvin_Grove.ps 35012 PostScript
Tune-6036-002_Kelvin_Grove.txt 494 Plain-text file with the extracted tune(s)
Tune-6036-get.log 4504 Log file, useful mostly for debugging
Tune-60365-get.log 1396 Log file, useful mostly for debugging
Tune-60369-get.log 1396 Log file, useful mostly for debugging
These files should be available for 24 hours.