Got HTTP status 404 Not Found for "http://roaringjelly.org/~jc/music/book/1811/Kohlers3.abc"
pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-1836-Kohlers3.ps) >>/Users/jc/w/tmp/Tune-1836-get.log 2>&1" returned status 256
http://roaringjelly.org/~jc/music/book/1811/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
Form_18368.log 964 Log file, useful mostly for debugging
Tune-1836-20662_Miss_Gays_Reel.abc 653 ABC music file with the extracted tune(s)
Tune-1836-20662_Miss_Gays_Reel.pdf 14538 Portable Data Format
Tune-1836-20662_Miss_Gays_Reel.ps 35893 PostScript
Tune-1836-20662_Miss_Gays_Reel.txt 653 Plain-text file with the extracted tune(s)
Tune-1836-Kohlers3.abc 145 ABC music file with the extracted tune(s)
Tune-1836-Kohlers3.ps 6 PostScript
Tune-1836-Kohlers3.txt 145 Plain-text file with the extracted tune(s)
Tune-1836-get.log 9817 Log file, useful mostly for debugging
Tune-18364-get.log 1218 Log file, useful mostly for debugging
These files should be available for 24 hours.