Got HTTP status 404 Not Found for "http://john-chambers.us/~jc/music/book/hambo/v2tune.abc"
pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-3955-v2tune.ps) >>/Users/jc/w/tmp/Tune-3955-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/hambo/v2tune.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_3955.log 611698 Log file, useful mostly for debugging
Coll_39552.log 2294847 Log file, useful mostly for debugging
Coll_39554.log 292760 Log file, useful mostly for debugging
Coll_39555.log 287140 Log file, useful mostly for debugging
Coll_39556.log 859926 Log file, useful mostly for debugging
Tune-3955-get.log 3988 Log file, useful mostly for debugging
Tune-3955-v2tune.abc 144 ABC music file with the extracted tune(s)
Tune-3955-v2tune.ps 6 PostScript
Tune-3955-v2tune.txt 144 Plain-text file with the extracted tune(s)
Tune-39553-get.log 4879 Log file, useful mostly for debugging
Tune-39557-Feuillet_Essex_FtFIoD2.abc 161 ABC music file with the extracted tune(s)
Tune-39557-Feuillet_Essex_FtFIoD2.ps 6 PostScript
Tune-39557-Feuillet_Essex_FtFIoD2.txt 161 Plain-text file with the extracted tune(s)
Tune-39557-get.log 4374 Log file, useful mostly for debugging
Tune-39558-get.log 66288 Log file, useful mostly for debugging
These files should be available for 24 hours.