Got HTTP status 404 Not Found for "http://john-chambers.us/~jc/music/book/CPC/FOEFDA.abc"
pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-63514-FOEFDA.ps) >>/Users/jc/w/tmp/Tune-63514-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/CPC/FOEFDA.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_63514.log 272211 Log file, useful mostly for debugging
Tune-63514-EliasHowe_MusiciansCompanionP2-1843-V2.abc 175 ABC music file with the extracted tune(s)
Tune-63514-EliasHowe_MusiciansCompanionP2-1843-V2.pdf 2217 Portable Data Format
Tune-63514-EliasHowe_MusiciansCompanionP2-1843-V2.ps 6 PostScript
Tune-63514-EliasHowe_MusiciansCompanionP2-1843-V2.txt 175 Plain-text file with the extracted tune(s)
Tune-63514-FOEFDA.abc 142 ABC music file with the extracted tune(s)
Tune-63514-FOEFDA.ps 6 PostScript
Tune-63514-FOEFDA.txt 142 Plain-text file with the extracted tune(s)
Tune-63514-get.log 9683 Log file, useful mostly for debugging
These files should be available for 24 hours.