Got HTTP status 404 Not Found for "http://john-chambers.us/~jc/music/book/AB/Thompson_V3_1766-1772_FTM.abc"
pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-7910-Thompson_V3_1766-1772_FTM.ps) >>/Users/jc/w/tmp/Tune-7910-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/AB/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
Find_79100.log 1639 Log file, useful mostly for debugging
Tune-7910-Thompson_V3_1766-1772_FTM.abc 160 ABC music file with the extracted tune(s)
Tune-7910-Thompson_V3_1766-1772_FTM.ps 6 PostScript
Tune-7910-Thompson_V3_1766-1772_FTM.txt 160 Plain-text file with the extracted tune(s)
Tune-7910-get.log 4369 Log file, useful mostly for debugging
Tune-79100-Wilson_Harmony_4NCD_1812_V1.abc 164 ABC music file with the extracted tune(s)
Tune-79100-Wilson_Harmony_4NCD_1812_V1.ps 6 PostScript
Tune-79100-Wilson_Harmony_4NCD_1812_V1.txt 164 Plain-text file with the extracted tune(s)
Tune-79100-get.log 4493 Log file, useful mostly for debugging
Tune-79105-get.log 1304 Log file, useful mostly for debugging
Tune-79109-CaledonianMusicalRepository_1811.abc 169 ABC music file with the extracted tune(s)
Tune-79109-CaledonianMusicalRepository_1811.txt 169 Plain-text file with the extracted tune(s)
Tune-79109-get.log 6766 Log file, useful mostly for debugging
These files should be available for 24 hours.