pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-14233-4312_the_Argyll_Bowling_Green.ps) >>/Users/jc/w/tmp/Tune-14233-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/Gow/CR/4312_the_Argyll_Bowling_Green.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_14233.log 1127330 Log file, useful mostly for debugging
Tune-14233-4312_the_Argyll_Bowling_Green.abc 949 ABC music file with the extracted tune(s)
Tune-14233-4312_the_Argyll_Bowling_Green.ps 37878 PostScript
Tune-14233-4312_the_Argyll_Bowling_Green.txt 949 Plain-text file with the extracted tune(s)
Tune-14233-get.log 10388 Log file, useful mostly for debugging
These files should be available for 24 hours.