pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-15811-69_WelchJig.ps) >>/Users/jc/w/tmp/Tune-15811-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/DftY/1791/Thompson/69_WelchJig.abc

Error exit status 256; here are some files to check:
[get.cgi V=1/1 B=0 scale=0.55 512x512 PNG]
filesizedescription
Tune-15811-69_WelchJig.abc 749 ABC music file with the extracted tune(s)
Tune-15811-69_WelchJig.ps 34595 PostScript
Tune-15811-69_WelchJig.txt 749 Plain-text file with the extracted tune(s)
Tune-15811-get.log 4501 Log file, useful mostly for debugging
These files should be available for 24 hours.