Got HTTP status 404 Not Found for "http://roaringjelly.org/~jc/music/book/Sets/Kohlers1.abc"
pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-4341-Kohlers1.ps) >>/Users/jc/w/tmp/Tune-4341-get.log 2>&1" returned status 256
http://roaringjelly.org/~jc/music/book/Sets/Kohlers1.abc

Error exit status 256; here are some files to check:
[P=tuneget V=1/1 B=0 scale=0.70 512x512 PNG]
filesizedescription
Form_43410.log 906 Log file, useful mostly for debugging
Form_43419.log 844 Log file, useful mostly for debugging
Tune-4341-Kohlers1.abc 145 ABC music file with the extracted tune(s)
Tune-4341-Kohlers1.ps 6 PostScript
Tune-4341-Kohlers1.txt 145 Plain-text file with the extracted tune(s)
Tune-4341-get.log 4026 Log file, useful mostly for debugging
Tune-43417-Playford_COST.abc 169 ABC music file with the extracted tune(s)
Tune-43417-Playford_COST.ps 6 PostScript
Tune-43417-Playford_COST.txt 169 Plain-text file with the extracted tune(s)
Tune-43417-get.log 8254 Log file, useful mostly for debugging
These files should be available for 24 hours.