Got HTTP status 404 Not Found for "http://roaringjelly.org/~jc/music/book/1760/Kohlers3.abc"
pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-9160-Kohlers3.ps) >>/Users/jc/w/tmp/Tune-9160-get.log 2>&1" returned status 256
http://roaringjelly.org/~jc/music/book/1760/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
Tune-9160-Kohlers3.abc 145 ABC music file with the extracted tune(s)
Tune-9160-Kohlers3.ps 6 PostScript
Tune-9160-Kohlers3.txt 145 Plain-text file with the extracted tune(s)
Tune-9160-get.log 4024 Log file, useful mostly for debugging
Tune-91600-PaulBackstrom-LfD.abc 154 ABC music file with the extracted tune(s)
Tune-91600-PaulBackstrom-LfD.pdf 2217 Portable Data Format
Tune-91600-PaulBackstrom-LfD.ps 6 PostScript
Tune-91600-PaulBackstrom-LfD.txt 154 Plain-text file with the extracted tune(s)
Tune-91600-get.log 11887 Log file, useful mostly for debugging
Tune-91603-get.log 4616 Log file, useful mostly for debugging
Tune-91607-get.log 5793 Log file, useful mostly for debugging
Tune-91608-WilliamShepherdsCollections.abc 164 ABC music file with the extracted tune(s)
Tune-91608-WilliamShepherdsCollections.ps 6 PostScript
Tune-91608-WilliamShepherdsCollections.txt 164 Plain-text file with the extracted tune(s)
Tune-91608-get.log 4348 Log file, useful mostly for debugging
These files should be available for 24 hours.