Got HTTP status 404 Not Found for "http://john-chambers.us/~jc/music/book/was/EliasHowe_MusiciansCompanionP3-1844-V2.abc"
pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-6335-EliasHowe_MusiciansCompanionP3-1844-V2.ps) >>/Users/jc/w/tmp/Tune-6335-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/was/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
Tune-6335-EliasHowe_MusiciansCompanionP3-1844-V2.abc 174 ABC music file with the extracted tune(s)
Tune-6335-EliasHowe_MusiciansCompanionP3-1844-V2.ps 6 PostScript
Tune-6335-EliasHowe_MusiciansCompanionP3-1844-V2.txt 174 Plain-text file with the extracted tune(s)
Tune-6335-get.log 13887 Log file, useful mostly for debugging
Tune-63350-24CountryDances_1776_Randall.abc 164 ABC music file with the extracted tune(s)
Tune-63350-24CountryDances_1776_Randall.ps 6 PostScript
Tune-63350-24CountryDances_1776_Randall.txt 164 Plain-text file with the extracted tune(s)
Tune-63350-get.log 4361 Log file, useful mostly for debugging
Tune-63352-get.log 19704 Log file, useful mostly for debugging
Tune-63354-Jean_Henry_dAnglebert_PdC2.abc 164 ABC music file with the extracted tune(s)
Tune-63354-Jean_Henry_dAnglebert_PdC2.ps 6 PostScript
Tune-63354-Jean_Henry_dAnglebert_PdC2.txt 164 Plain-text file with the extracted tune(s)
Tune-63354-get.log 8721 Log file, useful mostly for debugging
Tune-63356-get.log 5352 Log file, useful mostly for debugging
Tune-63358-get.log 4612 Log file, useful mostly for debugging
These files should be available for 24 hours.