Got HTTP status 404 Not Found for "http://john-chambers.us/~jc/music/book/MM4/MoF.abc"
pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-5866-MoF.ps) >>/Users/jc/w/tmp/Tune-5866-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/MM4/MoF.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_58664.log 293209 Log file, useful mostly for debugging
Find_58665.log 1874 Log file, useful mostly for debugging
Tune-5866-MoF.abc 139 ABC music file with the extracted tune(s)
Tune-5866-MoF.ps 6 PostScript
Tune-5866-MoF.txt 139 Plain-text file with the extracted tune(s)
Tune-5866-get.log 3915 Log file, useful mostly for debugging
Tune-58666-Goulding_SSEIFA_v1.abc 155 ABC music file with the extracted tune(s)
Tune-58666-Goulding_SSEIFA_v1.pdf 2217 Portable Data Format
Tune-58666-Goulding_SSEIFA_v1.ps 6 PostScript
Tune-58666-Goulding_SSEIFA_v1.txt 155 Plain-text file with the extracted tune(s)
Tune-58666-get.log 5114 Log file, useful mostly for debugging
These files should be available for 24 hours.