Got HTTP status 404 Not Found for "http://john-chambers.us/~jc/music/book/NewWineInOldBottles/EliasHowe_MusiciansCompanionP3-1844-V2.abc"
pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-6572-EliasHowe_MusiciansCompanionP3-1844-V2.ps) >>/Users/jc/w/tmp/Tune-6572-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/NewWineInOldBottles/EliasHowe_MusiciansCompanionP3-1844-V2.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_65728.log 129130 Log file, useful mostly for debugging
Tune-49035-Tune-65727-BostonCollection.abc 179 ABC music file with the extracted tune(s)
Tune-49035-Tune-65727-BostonCollection.txt 179 Plain-text file with the extracted tune(s)
Tune-6572-EliasHowe_MusiciansCompanionP3-1844-V2.abc 190 ABC music file with the extracted tune(s)
Tune-6572-EliasHowe_MusiciansCompanionP3-1844-V2.ps 6 PostScript
Tune-6572-EliasHowe_MusiciansCompanionP3-1844-V2.txt 190 Plain-text file with the extracted tune(s)
Tune-6572-get.log 4740 Log file, useful mostly for debugging
Tune-65725-24CountryDances_1809_Cahusac_FTM.abc 173 ABC music file with the extracted tune(s)
Tune-65725-24CountryDances_1809_Cahusac_FTM.pdf 2217 Portable Data Format
Tune-65725-24CountryDances_1809_Cahusac_FTM.ps 6 PostScript
Tune-65725-24CountryDances_1809_Cahusac_FTM.txt 173 Plain-text file with the extracted tune(s)
Tune-65725-get.log 5546 Log file, useful mostly for debugging
These files should be available for 24 hours.