Got HTTP status 404 Not Found for "http://john-chambers.us/~jc/music/book/abc2/book_of_rights.abc"
pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-8670-book_of_rights.ps) >>/Users/jc/w/tmp/Tune-8670-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/abc2/book_of_rights.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_86701.log 508812 Log file, useful mostly for debugging
Coll_86706.log 148655 Log file, useful mostly for debugging
Tune-8670-book_of_rights.abc 151 ABC music file with the extracted tune(s)
Tune-8670-book_of_rights.ps 6 PostScript
Tune-8670-book_of_rights.txt 151 Plain-text file with the extracted tune(s)
Tune-8670-get.log 4146 Log file, useful mostly for debugging
Tune-86700-get.log 4629 Log file, useful mostly for debugging
Tune-86701-get.log 4984 Log file, useful mostly for debugging
Tune-86702-get.log 3548 Log file, useful mostly for debugging
Tune-86704-get.log 13670 Log file, useful mostly for debugging
Tune-86706-get.log 8204 Log file, useful mostly for debugging
Tune-86707-EliasHowe_MusiciansCompanionP1-1842-V1.abc 174 ABC music file with the extracted tune(s)
Tune-86707-EliasHowe_MusiciansCompanionP1-1842-V1.ps 6 PostScript
Tune-86707-EliasHowe_MusiciansCompanionP1-1842-V1.txt 174 Plain-text file with the extracted tune(s)
Tune-86707-get.log 4575 Log file, useful mostly for debugging
Tune-86709-get.log 10078 Log file, useful mostly for debugging
These files should be available for 24 hours.