Got HTTP status 404 Not Found for "http://john-chambers.us/~jc/music/book/1777/Glen2.abc"
pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-3967-Glen2.ps) >>/Users/jc/w/tmp/Tune-3967-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/1777/Glen2.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_39678.log 280612 Log file, useful mostly for debugging
Tune-3967-Glen2.abc 142 ABC music file with the extracted tune(s)
Tune-3967-Glen2.ps 6 PostScript
Tune-3967-Glen2.txt 142 Plain-text file with the extracted tune(s)
Tune-3967-get.log 12496 Log file, useful mostly for debugging
Tune-39670-get.log 4167 Log file, useful mostly for debugging
Tune-39671-get.log 4042 Log file, useful mostly for debugging
Tune-39672-get.log 4142 Log file, useful mostly for debugging
Tune-39673-get.log 5636 Log file, useful mostly for debugging
Tune-39674-get.log 8565 Log file, useful mostly for debugging
Tune-39675-JohnJohnson_ChoiceCollectionVol8-V1.abc 174 ABC music file with the extracted tune(s)
Tune-39675-JohnJohnson_ChoiceCollectionVol8-V1.pdf 2217 Portable Data Format
Tune-39675-JohnJohnson_ChoiceCollectionVol8-V1.ps 6 PostScript
Tune-39675-JohnJohnson_ChoiceCollectionVol8-V1.txt 174 Plain-text file with the extracted tune(s)
Tune-39675-get.log 10275 Log file, useful mostly for debugging
Tune-39676-get.log 4408 Log file, useful mostly for debugging
Tune-39677-get.log 4360 Log file, useful mostly for debugging
Tune-39679-get.log 13905 Log file, useful mostly for debugging
These files should be available for 24 hours.