Got HTTP status 404 Not Found for "http://roaringjelly.org/~jc/music/book/1784/Kohlers.abc"
pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-10609-Kohlers.ps) >>/Users/jc/w/tmp/Tune-10609-get.log 2>&1" returned status 256
http://roaringjelly.org/~jc/music/book/1784/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
Coll_10609.log 234894 Log file, useful mostly for debugging
Tune-10609-20222_New_York_Hornpipe.abc 658 ABC music file with the extracted tune(s)
Tune-10609-20222_New_York_Hornpipe.ps 34915 PostScript
Tune-10609-20222_New_York_Hornpipe.txt 658 Plain-text file with the extracted tune(s)
Tune-10609-Kohlers.abc 144 ABC music file with the extracted tune(s)
Tune-10609-Kohlers.ps 6 PostScript
Tune-10609-Kohlers.txt 144 Plain-text file with the extracted tune(s)
Tune-10609-get.log 8971 Log file, useful mostly for debugging
These files should be available for 24 hours.