Got HTTP status 404 Not Found for "http://john-chambers.us/~jc/music/book/Potpourri/Round_Band_Book_of_Playford.abc"
pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-1643-Round_Band_Book_of_Playford.ps) >>/Users/jc/w/tmp/Tune-1643-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/Potpourri/Round_Band_Book_of_Playford.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_16432.log 1133109 Log file, useful mostly for debugging
Coll_16436.log 271685 Log file, useful mostly for debugging
Tune-1643-Round_Band_Book_of_Playford.abc 169 ABC music file with the extracted tune(s)
Tune-1643-Round_Band_Book_of_Playford.ps 6 PostScript
Tune-1643-Round_Band_Book_of_Playford.txt 169 Plain-text file with the extracted tune(s)
Tune-1643-get.log 4453 Log file, useful mostly for debugging
Tune-16432-JohnTreat_GftF1.abc 164 ABC music file with the extracted tune(s)
Tune-16432-JohnTreat_GftF1.ps 6 PostScript
Tune-16432-JohnTreat_GftF1.txt 164 Plain-text file with the extracted tune(s)
Tune-16432-get.log 4168 Log file, useful mostly for debugging
Tune-16438-get.log 9561 Log file, useful mostly for debugging
These files should be available for 24 hours.