convergence problem

Hi,
I tried your code on my dataset(2k bodies).
It didn't get to convergence even after 100,000 iterations.
Some bodies are pushed further away when I checked the status of each iteration.

I'm running your code without setting the mass of bodies(they only get the initial mass when init bodies).

Do you have any idea about this issue?
Thank you!

Reproduce the convergence problem with the reported dataset size of about 2,000 bodies and up to 100,000 iterations. Inspect the iteration status and the behavior when bodies retain only their initial mass; done means identifying and addressing the cause of bodies moving farther away or documenting the required mass setup.

Written by the indexing model from the issue text.