Got HTTP status 404 Not Found for "http://john-chambers.us/~jc/music/book/_/Kohlers3.abc"
pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-7238-Kohlers3.ps) >>/Users/jc/w/tmp/Tune-7238-get.log 2>&1" returned status 256
http://john-chambers.us/~jc/music/book/_/Kohlers3.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_7238.log 1473240 Log file, useful mostly for debugging
Coll_72380.log 291355 Log file, useful mostly for debugging
Coll_72383.log 287140 Log file, useful mostly for debugging
Coll_72387.log 282925 Log file, useful mostly for debugging
Find_72382.log 1502 Log file, useful mostly for debugging
Tune-7238-Kohlers3.abc 142 ABC music file with the extracted tune(s)
Tune-7238-Kohlers3.ps 6 PostScript
Tune-7238-Kohlers3.txt 142 Plain-text file with the extracted tune(s)
Tune-7238-get.log 4006 Log file, useful mostly for debugging
Tune-72380-get.log 5166 Log file, useful mostly for debugging
Tune-72381-get.log 4925 Log file, useful mostly for debugging
These files should be available for 24 hours.