Got HTTP status 404 Not Found for "http://john-chambers.us/~jc/music/book/1804/WilliamCampbell_10thBook_1798-V1.abc"
pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-8226-WilliamCampbell_10thBook_1798-V1.ps) >>/Users/jc/w/tmp/Tune-8226-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/1804/WilliamCampbell_10thBook_1798-V1.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_82262.log 278710 Log file, useful mostly for debugging
Coll_82263.log 271685 Log file, useful mostly for debugging
Coll_82267.log 282925 Log file, useful mostly for debugging
Tune-8226-WilliamCampbell_10thBook_1798-V1.abc 169 ABC music file with the extracted tune(s)
Tune-8226-WilliamCampbell_10thBook_1798-V1.ps 6 PostScript
Tune-8226-WilliamCampbell_10thBook_1798-V1.txt 169 Plain-text file with the extracted tune(s)
Tune-8226-get.log 4524 Log file, useful mostly for debugging
These files should be available for 24 hours.