Hi Thanks Tim. Now i know that others are not having a problem with this, i put some time into trying to work out the problem as it semed to be project related. I started a new test project and all was fine. Untill importing my assets. AFter hours of crashes I worked out the fault was one blueprint that was a directional light blueprint. I changed the distance back to the default for distance field shadows. It would seem that the distance was set way too high, and when building the mesh distance fields it crashed instantly with the error details above.
If anyone else comes accross this problem then it is most likeley a lighting blurprint.
There is not much documentation about distance field lighting, and as you have had a lot of experience with this maybe you could give me a few words of advice.
My Project is a space combat sim, and the levels are set in large void areas of space with a few meshes such as asteroids, bases planets etc. As the game is mainly about movable meshes, is distance field shadows the best way to go? I think GI will suit my project much better which i have read is being looked into.
There are a few things about distance field shadows im not really sure about. For example in the project settings, there is the option to turn on and off the distance field shadows, but there is also a penumbra size with a default of 0.05. What exactly is this, and what sort of settings would benefit a project like mine.
Thanks again, and I know what to do now to submit a bug report properly 