How to deploy multiprocess script on heroku?

Question

Python

Hey everyone, I was trying to deploy my app to heroku but ran into a problem right after I run a sub process

g_vi = Process(target=grr, args=(thread_return, records))
g_vi.start()

Errors start to appear in the log, as soon as I remove this line everything works fine.
Does Heroku support multiprocessing or does it only have 1 worker? And is it possible to solve this problem in other ways?
Thank you in advance.