Got HTTP status 404 Not Found for "http://john-chambers.us/~jc/music/book/march/Wilson_Harmony_4NCD_1812_V2.abc"
pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-7045-Wilson_Harmony_4NCD_1812_V2.ps) >>/Users/jc/w/tmp/Tune-7045-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/march/Wilson_Harmony_4NCD_1812_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_70452.log 524822 Log file, useful mostly for debugging
Coll_70453.log 576620 Log file, useful mostly for debugging
Coll_70457.log 461209 Log file, useful mostly for debugging
Coll_70458.log 64293 Log file, useful mostly for debugging
Tune-7045-Wilson_Harmony_4NCD_1812_V2.abc 165 ABC music file with the extracted tune(s)
Tune-7045-Wilson_Harmony_4NCD_1812_V2.ps 6 PostScript
Tune-7045-Wilson_Harmony_4NCD_1812_V2.txt 165 Plain-text file with the extracted tune(s)
Tune-7045-get.log 4425 Log file, useful mostly for debugging
Tune-70450-get.log 4093 Log file, useful mostly for debugging
Tune-70456-get.log 11903 Log file, useful mostly for debugging
Tune-70457-get.log 4010 Log file, useful mostly for debugging
Tune-70458-get.log 5448 Log file, useful mostly for debugging
These files should be available for 24 hours.