The type or namespace name 'ParticleSystem' could not be found

[noanoa]

Hello. I’ve updated my unity from Unity 2018.2.6f1 (64-bit) to Unity 2018.3.0b4 (64-bit) and upon updating my project, I got this error

The type or namespace name ‘ParticleSystem’ could not be found (are you missing a using directive or an assembly reference?)

The project was just working before updating Unity and my scripts are fine.
I have some of the Built-In packages turned off in my project(Particle System package is enabeld).
“Wind” was one of the packages I’ve disabled and it seems when “Wind” package is enabled, I no longer get the error message above. I think it’s a bug

[Peter77]

This problem is being discussed in the following thread already:
https://discussions.unity.com/t/716373

Here is a quote from Unity staff:

@karl_jones

The Particle System uses the wind module in it’s external forces module. So if you disable wind then it will need to also remove particles. We will look into just disabling the external forces part instead of the whole thing.

[noanoa]

Thanks for the quote. I thought I should post it after googling and found nothing. Anyway…thanks.

[LeonhardP]

@noanoa

Thanks for the quote. I thought I should post it after googling and found nothing. Anyway…thanks.

Yes, better safe than sorry :).