Got HTTP status 404 Not Found for "http://roaringjelly.org/~jc/music/book/Gow4/Kohlers.abc"
pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-5945-Kohlers.ps) >>/Users/jc/w/tmp/Tune-5945-get.log 2>&1" returned status 256
http://roaringjelly.org/~jc/music/book/Gow4/Kohlers.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-5945-Kohlers.abc 144 ABC music file with the extracted tune(s)
Tune-5945-Kohlers.ps 6 PostScript
Tune-5945-Kohlers.txt 144 Plain-text file with the extracted tune(s)
Tune-5945-get.log 4003 Log file, useful mostly for debugging
Tune-59451-get.log 1391 Log file, useful mostly for debugging
Tune-59453-get.log 4092 Log file, useful mostly for debugging
Tune-59455-get.log 5265 Log file, useful mostly for debugging
Tune-59458-20773_Touch_Me_Not.abc 612 ABC music file with the extracted tune(s)
Tune-59458-20773_Touch_Me_Not.pdf 11979 Portable Data Format
Tune-59458-20773_Touch_Me_Not.ps 33684 PostScript
Tune-59458-20773_Touch_Me_Not.txt 612 Plain-text file with the extracted tune(s)
Tune-59458-get.log 5665 Log file, useful mostly for debugging
Tune-59459-get.log 5934 Log file, useful mostly for debugging
These files should be available for 24 hours.