Got HTTP status 404 Not Found for "http://john-chambers.us/~jc/music/book/1785/JohnJohnson_ChoiceCollectionVol8-V1.abc"
pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-2386-JohnJohnson_ChoiceCollectionVol8-V1.ps) >>/Users/jc/w/tmp/Tune-2386-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/1785/JohnJohnson_ChoiceCollectionVol8-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
Tune-2386-JohnJohnson_ChoiceCollectionVol8-V1.abc 172 ABC music file with the extracted tune(s)
Tune-2386-JohnJohnson_ChoiceCollectionVol8-V1.ps 6 PostScript
Tune-2386-JohnJohnson_ChoiceCollectionVol8-V1.txt 172 Plain-text file with the extracted tune(s)
Tune-2386-get.log 11281 Log file, useful mostly for debugging
Tune-23860-get.log 8497 Log file, useful mostly for debugging
Tune-23863-get.log 4110 Log file, useful mostly for debugging
Tune-23864-get.log 14292 Log file, useful mostly for debugging
Tune-23865-JohnJohnson_ChoiceCollectionVol8-V2.abc 185 ABC music file with the extracted tune(s)
Tune-23865-JohnJohnson_ChoiceCollectionVol8-V2.pdf 2217 Portable Data Format
Tune-23865-JohnJohnson_ChoiceCollectionVol8-V2.ps 6 PostScript
Tune-23865-JohnJohnson_ChoiceCollectionVol8-V2.txt 185 Plain-text file with the extracted tune(s)
Tune-23865-get.log 15491 Log file, useful mostly for debugging
Tune-23867-get.log 10453 Log file, useful mostly for debugging
Tune-23868-get.log 15775 Log file, useful mostly for debugging
Tune-23869-get.log 3662 Log file, useful mostly for debugging
These files should be available for 24 hours.