Got HTTP status 404 Not Found for "http://john-chambers.us/~jc/music/book/Sources.html/blank.abc"
pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-4579-blank.ps) >>/Users/jc/w/tmp/Tune-4579-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/Sources.html/blank.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_45794.log 1390684 Log file, useful mostly for debugging
Tune-4579-blank.abc 150 ABC music file with the extracted tune(s)
Tune-4579-blank.ps 6 PostScript
Tune-4579-blank.txt 150 Plain-text file with the extracted tune(s)
Tune-4579-get.log 10712 Log file, useful mostly for debugging
Tune-45790-get.log 4541 Log file, useful mostly for debugging
Tune-45791-get.log 7717 Log file, useful mostly for debugging
Tune-45792-get.log 9575 Log file, useful mostly for debugging
Tune-45793-get.log 3426 Log file, useful mostly for debugging
Tune-45794-IaST-abc1.abc 148 ABC music file with the extracted tune(s)
Tune-45794-IaST-abc1.pdf 2217 Portable Data Format
Tune-45794-IaST-abc1.ps 6 PostScript
Tune-45794-IaST-abc1.txt 148 Plain-text file with the extracted tune(s)
Tune-45794-get.log 9408 Log file, useful mostly for debugging
Tune-45795-get.log 8288 Log file, useful mostly for debugging
Tune-45796-get.log 7758 Log file, useful mostly for debugging
Tune-45797-get.log 4616 Log file, useful mostly for debugging
Tune-45798-get.log 5883 Log file, useful mostly for debugging
Tune-45799-get.log 5408 Log file, useful mostly for debugging
These files should be available for 24 hours.