certainly asking to much from the engine,
by spawning hundreds of objects that are using physic, i get this error message.
can people tel me more about this error ?
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This has happened before and has been reported in the bugs section. There is no fix as far as I know - it appears that the physics engine can sometimes become swamped by having to add too many objects into its database. Ways around this - don't spawn hundreds of objects at once! If you expect you will need them (like bits for an explosion, for example) then you could create them outside the layout and just move them when they are required.