Got HTTP status 404 Not Found for "http://john-chambers.us/~jc/music/book/FC/Thompson_V3_1766-1772_FTM.abc"
pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-2975-Thompson_V3_1766-1772_FTM.ps) >>/Users/jc/w/tmp/Tune-2975-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/FC/Thompson_V3_1766-1772_FTM.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-2975-Thompson_V3_1766-1772_FTM.abc 160 ABC music file with the extracted tune(s)
Tune-2975-Thompson_V3_1766-1772_FTM.ps 6 PostScript
Tune-2975-Thompson_V3_1766-1772_FTM.txt 160 Plain-text file with the extracted tune(s)
Tune-2975-get.log 4371 Log file, useful mostly for debugging
Tune-29754-get.log 1374 Log file, useful mostly for debugging
Tune-29755-24CountryDances_1803_Bland_Weller.abc 172 ABC music file with the extracted tune(s)
Tune-29755-24CountryDances_1803_Bland_Weller.txt 172 Plain-text file with the extracted tune(s)
Tune-29755-get.log 3614 Log file, useful mostly for debugging
Tune-29758-get.log 1322 Log file, useful mostly for debugging
These files should be available for 24 hours.