Got HTTP status 404 Not Found for "http://john-chambers.us/~jc/music/book/1818/slurs.abc"
pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-4556-slurs.ps) >>/Users/jc/w/tmp/Tune-4556-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/1818/slurs.abc

Error exit status 256; here are some files to check:
[P=tuneget V=1/1 B=0 scale=0.70 512x512 PNG]
filesizedescription
Coll_45561.log 518612 Log file, useful mostly for debugging
Coll_45566.log 294610 Log file, useful mostly for debugging
Tune-4556-get.log 13646 Log file, useful mostly for debugging
Tune-4556-slurs.abc 142 ABC music file with the extracted tune(s)
Tune-4556-slurs.ps 6 PostScript
Tune-4556-slurs.txt 142 Plain-text file with the extracted tune(s)
Tune-45560-12SelectedCountryDances_1772_Rutherford.abc 178 ABC music file with the extracted tune(s)
Tune-45560-12SelectedCountryDances_1772_Rutherford.ps 6 PostScript
Tune-45560-12SelectedCountryDances_1772_Rutherford.txt 178 Plain-text file with the extracted tune(s)
Tune-45560-get.log 9629 Log file, useful mostly for debugging
Tune-45562-get.log 1293 Log file, useful mostly for debugging
Tune-45563-get.log 8578 Log file, useful mostly for debugging
Tune-45566-get.log 8512 Log file, useful mostly for debugging
Tune-45567-get.log 8208 Log file, useful mostly for debugging
Tune-45568-get.log 4455 Log file, useful mostly for debugging
Tune-45569-get.log 9341 Log file, useful mostly for debugging
These files should be available for 24 hours.