Got HTTP status 404 Not Found for "http://john-chambers.us/~jc/music/book/tune/JohnJohnson_ChoiceCollectionVol8-VMP.abc"
pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-2175-JohnJohnson_ChoiceCollectionVol8-VMP.ps) >>/Users/jc/w/tmp/Tune-2175-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/tune/JohnJohnson_ChoiceCollectionVol8-VMP.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_21759.log 291810 Log file, useful mostly for debugging
Tune-2175-JohnJohnson_ChoiceCollectionVol8-VMP.abc 173 ABC music file with the extracted tune(s)
Tune-2175-JohnJohnson_ChoiceCollectionVol8-VMP.ps 6 PostScript
Tune-2175-JohnJohnson_ChoiceCollectionVol8-VMP.txt 173 Plain-text file with the extracted tune(s)
Tune-2175-get.log 4608 Log file, useful mostly for debugging
Tune-21751-2179_the_Duchess_Slipper.abc 484 ABC music file with the extracted tune(s)
Tune-21751-2179_the_Duchess_Slipper.ps 35534 PostScript
Tune-21751-2179_the_Duchess_Slipper.txt 484 Plain-text file with the extracted tune(s)
Tune-21751-get.log 4812 Log file, useful mostly for debugging
Tune-21754-BostonCollection.abc 153 ABC music file with the extracted tune(s)
Tune-21754-BostonCollection.pdf 2217 Portable Data Format
Tune-21754-BostonCollection.ps 6 PostScript
Tune-21754-BostonCollection.txt 153 Plain-text file with the extracted tune(s)
Tune-21754-get.log 5054 Log file, useful mostly for debugging
These files should be available for 24 hours.