Got HTTP status 404 Not Found for "http://john-chambers.us/~jc/music/book/Book43/Kohlers1.abc"
pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-8454-Kohlers1.ps) >>/Users/jc/w/tmp/Tune-8454-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/Book43/Kohlers1.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_84549.log 1479 Log file, useful mostly for debugging
Tune-8454-Kohlers1.abc 147 ABC music file with the extracted tune(s)
Tune-8454-Kohlers1.ps 6 PostScript
Tune-8454-Kohlers1.txt 147 Plain-text file with the extracted tune(s)
Tune-8454-get.log 7628 Log file, useful mostly for debugging
Tune-84541-get.log 4700 Log file, useful mostly for debugging
Tune-84542-get.log 4977 Log file, useful mostly for debugging
Tune-84543-CSRHW-abc1.abc 147 ABC music file with the extracted tune(s)
Tune-84543-CSRHW-abc1.pdf 2217 Portable Data Format
Tune-84543-CSRHW-abc1.ps 6 PostScript
Tune-84543-CSRHW-abc1.txt 147 Plain-text file with the extracted tune(s)
Tune-84543-get.log 4884 Log file, useful mostly for debugging
Tune-84545-get.log 14368 Log file, useful mostly for debugging
Tune-84547-get.log 4610 Log file, useful mostly for debugging
Tune-84548-get.log 4187 Log file, useful mostly for debugging
Tune-84549-get.log 4355 Log file, useful mostly for debugging
These files should be available for 24 hours.