pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-9089-1202_the_Braes_of_Auchtertyre.ps) >>/Users/jc/w/tmp/Tune-9089-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/Gow/CR/1202_the_Braes_of_Auchtertyre.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_90894.log 1151215 Log file, useful mostly for debugging
Form_90896.log 1115 Log file, useful mostly for debugging
Tune-9089-1202_the_Braes_of_Auchtertyre.abc 1073 ABC music file with the extracted tune(s)
Tune-9089-1202_the_Braes_of_Auchtertyre.ps 39810 PostScript
Tune-9089-1202_the_Braes_of_Auchtertyre.txt 1073 Plain-text file with the extracted tune(s)
Tune-9089-get.log 4874 Log file, useful mostly for debugging
Tune-90890-get.log 3972 Log file, useful mostly for debugging
Tune-90895-get.log 91836 Log file, useful mostly for debugging
Tune-90898-get.log 1394 Log file, useful mostly for debugging
These files should be available for 24 hours.