pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-38683-San_Francisco_Branch_Polka_D.ps) >>/Users/jc/w/tmp/Tune-38683-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/abc/polka/San_Francisco_Branch_Polka_D.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-38683-San_Francisco_Branch_Polka_D.abc 627 ABC music file with the extracted tune(s)
Tune-38683-San_Francisco_Branch_Polka_D.ps 39229 PostScript
Tune-38683-San_Francisco_Branch_Polka_D.txt 627 Plain-text file with the extracted tune(s)
Tune-38683-get.log 4758 Log file, useful mostly for debugging
These files should be available for 24 hours.