pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-81428-B-barndance.ps) >>/Users/jc/w/tmp/Tune-81428-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/abc/mirror/thisoldtractor.com/B-barndance.abc

Error exit status 256; here are some files to check:

[P=get.cgi V=1/1 B=0 scale=0.60 512x512 PNG]
filesizedescription
Tune-81428-B-barndance.abc 862 ABC music file with the extracted tune(s)
Tune-81428-B-barndance.ps 45022 PostScript
Tune-81428-B-barndance.txt 862 Plain-text file with the extracted tune(s)
Tune-81428-get.log 8523 Log file, useful mostly for debugging
These files should be available for 24 hours.