Got HTTP status 404 Not Found for "http://roaringjelly.org/~jc/music/book/1802/Kerr_MM3-V1.abc"
pngcmd="(./ps2png 512 512 /Users/jc/w/tmp/Tune-88903-Kerr_MM3-V1.ps) >>/Users/jc/w/tmp/Tune-88903-get.log 2>&1" returned status 256
http://roaringjelly.org/~jc/music/book/1802/Kerr_MM3-V1.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-88903-4316_Welcome_the_Present_Maritana.abc 418 ABC music file with the extracted tune(s)
Tune-88903-4316_Welcome_the_Present_Maritana.gif 0 Graphics Interchange Format, the proprietary scan-line picture format
Tune-88903-4316_Welcome_the_Present_Maritana.ps 32653 PostScript
Tune-88903-4316_Welcome_the_Present_Maritana.txt 418 Plain-text file with the extracted tune(s)
Tune-88903-Kerr_MM3-V1.abc 148 ABC music file with the extracted tune(s)
Tune-88903-Kerr_MM3-V1.ps 6 PostScript
Tune-88903-Kerr_MM3-V1.txt 148 Plain-text file with the extracted tune(s)
Tune-88903-get.log 9990 Log file, useful mostly for debugging
These files should be available for 24 hours.