Got HTTP status 404 Not Found for "http://john-chambers.us/~jc/music/book/Kerr_MM/NorthumbrianMinstrelsy.abc"
pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-6576-NorthumbrianMinstrelsy.ps) >>/Users/jc/w/tmp/Tune-6576-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/Kerr_MM/NorthumbrianMinstrelsy.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_6576.log 287140 Log file, useful mostly for debugging
Coll_65764.log 294165 Log file, useful mostly for debugging
Coll_65768.log 285735 Log file, useful mostly for debugging
Tune-6576-NorthumbrianMinstrelsy.abc 162 ABC music file with the extracted tune(s)
Tune-6576-NorthumbrianMinstrelsy.ps 6 PostScript
Tune-6576-NorthumbrianMinstrelsy.txt 162 Plain-text file with the extracted tune(s)
Tune-6576-get.log 4334 Log file, useful mostly for debugging
Tune-65763-get.log 1418 Log file, useful mostly for debugging
Tune-65764-get.log 1385 Log file, useful mostly for debugging
Tune-65769-EliasHowe_MusiciansCompanionP2-1843-V2.abc 183 ABC music file with the extracted tune(s)
Tune-65769-EliasHowe_MusiciansCompanionP2-1843-V2.ps 6 PostScript
Tune-65769-EliasHowe_MusiciansCompanionP2-1843-V2.txt 183 Plain-text file with the extracted tune(s)
Tune-65769-get.log 4748 Log file, useful mostly for debugging
These files should be available for 24 hours.