pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-83472-000_Title.ps) >>/Users/jc/w/tmp/Tune-83472-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/DftY/1779/Thompson/000_Title.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_83472.log 281520 Log file, useful mostly for debugging
Tune-83472-000_Title.abc 596 ABC music file with the extracted tune(s)
Tune-83472-000_Title.ps 31485 PostScript
Tune-83472-000_Title.txt 596 Plain-text file with the extracted tune(s)
Tune-83472-get.log 9147 Log file, useful mostly for debugging
These files should be available for 24 hours.