Got HTTP status 404 Not Found for "http://john-chambers.us/~jc/music/book/abc2/24CountryDances_1782_Thompson.abc"
pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-8876-24CountryDances_1782_Thompson.ps) >>/Users/jc/w/tmp/Tune-8876-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/abc2/24CountryDances_1782_Thompson.abc

Error exit status 256; here are some files to check:
[P=tuneget V=1/1 B=0 scale=0.70 512x512 PNG]
filesizedescription
Sess-88760.log 1739634 Log file, useful mostly for debugging
Tune-8876-24CountryDances_1782_Thompson.abc 166 ABC music file with the extracted tune(s)
Tune-8876-24CountryDances_1782_Thompson.ps 6 PostScript
Tune-8876-24CountryDances_1782_Thompson.txt 166 Plain-text file with the extracted tune(s)
Tune-8876-get.log 4463 Log file, useful mostly for debugging
Tune-88762-EliasHowe_MusiciansCompanionP3-1844-V1.abc 176 ABC music file with the extracted tune(s)
Tune-88762-EliasHowe_MusiciansCompanionP3-1844-V1.pdf 2217 Portable Data Format
Tune-88762-EliasHowe_MusiciansCompanionP3-1844-V1.ps 6 PostScript
Tune-88762-EliasHowe_MusiciansCompanionP3-1844-V1.txt 176 Plain-text file with the extracted tune(s)
Tune-88762-get.log 5702 Log file, useful mostly for debugging
These files should be available for 24 hours.