Hi Alan,
The “could not allocate output buffer” message occurs if the program can’t allocate enough memory to do the stack or if the star and/or comet offset pixel-shift lists are incorrect. Can you post the exact command line that you are using so I can see where it might be going wrong.
It looks as if I can’t attach scripts to the posts here but you can find it here:
https://nickdjames.com/astrolinux/
Nick.