can't see particles when I restart render

[JD3D_CGI]

I'm new to phoenix and still getting to grips - and I'm still trying to work through a basic tutorial scene - but I keep having a problem when I need to restart a scene if I want to see anything,

Do I have to delete the particle cache every time I need to restart? or do anything.

I feel like I should be able to scrub back to the start and then start the simulation again, but then I don't see anything particle emission. Using max 2015 and the latest PFD.

This seems to happen on multiple computers too.

[Guest]

Hi,
what do you mean "to restart the scene"? And what kind of particles you don't see?
If you delete the cache files then you would see nothing and must simulate again.
"but then I don't see anything particle emission" - you don't see particles in the viewport or in rendered picture?