Got HTTP status 404 Not Found for "http://roaringjelly.org/~jc/music/book/MacNab02/Kohlers2.abc"
pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-6438-Kohlers2.ps) >>/Users/jc/w/tmp/Tune-6438-get.log 2>&1" returned status 256
http://roaringjelly.org/~jc/music/book/MacNab02/Kohlers2.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_64387.log 1423 Log file, useful mostly for debugging
Tune-6438-Kohlers2.abc 149 ABC music file with the extracted tune(s)
Tune-6438-Kohlers2.ps 6 PostScript
Tune-6438-Kohlers2.txt 149 Plain-text file with the extracted tune(s)
Tune-6438-get.log 4044 Log file, useful mostly for debugging
Tune-64387-get.log 4543 Log file, useful mostly for debugging
Tune-64388-Green_Sleeves_209_2-Am-32-2.abc 624 ABC music file with the extracted tune(s)
Tune-64388-Green_Sleeves_209_2-Am-32-2.ps 33452 PostScript
Tune-64388-Green_Sleeves_209_2-Am-32-2.txt 624 Plain-text file with the extracted tune(s)
Tune-64388-get.log 10589 Log file, useful mostly for debugging
These files should be available for 24 hours.