X:0 not found in http://john-chambers.us/~jc/music/book/DftY/1782/Thompson/811_Swiss_Allemand.abc
pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-95819-811_Swiss_Allemand.ps) >>/Users/jc/w/tmp/Tune-95819-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/DftY/1782/Thompson/811_Swiss_Allemand.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_95819.log 561635 Log file, useful mostly for debugging
Tune-95819-811_Swiss_Allemand.abc 0 ABC music file with the extracted tune(s)
Tune-95819-811_Swiss_Allemand.ps 6 PostScript
Tune-95819-811_Swiss_Allemand.txt 0 Plain-text file with the extracted tune(s)
Tune-95819-get.log 4223 Log file, useful mostly for debugging
These files should be available for 24 hours.