pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-40163-10142_White_Cockade.ps) >>/Users/jc/w/tmp/Tune-40163-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/ERM/10142_White_Cockade.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-40163-10142_White_Cockade.abc 565 ABC music file with the extracted tune(s)
Tune-40163-10142_White_Cockade.ps 35439 PostScript
Tune-40163-10142_White_Cockade.txt 565 Plain-text file with the extracted tune(s)
Tune-40163-abc1.abc 151 ABC music file with the extracted tune(s)
Tune-40163-abc1.ps 6 PostScript
Tune-40163-abc1.txt 151 Plain-text file with the extracted tune(s)
Tune-40163-get.log 8466 Log file, useful mostly for debugging
These files should be available for 24 hours.