Hi, What are the possible causes for directx to say: "D3D9 Helper: IDirect3DDevice9::DrawIndexedPrimitive failed: D3DERR_INVALIDCALL Direct3D9: (ERROR) :Index stream does not have required number of indices. DrawIndexedPrimitive failed." If d3d is in retail mode then it will complain about a viewport problem which i assume is caused by the primitive trashing somehow the video memory.. in d3d debug mode, i get the message above and i don't get what could be the cause. Obviously, the data passed to the DrawIndexedPrimitive call is valid and the rendering works properly if used from a different location in the code (I m trying to do some kind of offline rendering right now). So I suspect I did not enable or initialize something i should have. Any suggestions? Thanks in advance.

The solution is in your question..[smile]
"Index stream does not have required number of indices"
So you need x amount of vertices, and y amount of indices.
Possible errors:
1. You are passing wrong number of indices.
2. You may have to many indices, that will cause buffer overflow (check out your MaxVertexIndex value in the capabilities struct (65534 is max???) )
3. You are using 32Bit indices and your graphic card doesn't support them

And i also say "the data passed to the DrawIndexedPrimitive call is valid and the rendering works properly if used from a different location in the code" :)
1. the number of indices is right
2. i dont have too many indices
3. it works on that card

Basically, i m just calling a Draw() method which renders everything i want but from a different "begin/endscene" than the one where it renders on screen.
I do that cause i want the scene to be renderer offline to a rendertarget.
So the only difference comes only from the previous d3d calls..
And the release version showing a different error makes me not to rely TOO much on the accuracy of the error report.

I did check all of those, and I have tried to do a capture in PIX, however, I haven't been able to get a capture yet... For some reasons, even though the user event which triggers the capture is at the right location and is triggered at the time it should, the capture shows a frame for another viewport and I'm still trying to figure out why... It would help if i could do a proper capture indeed :)

Thank you for helping :)
Stupid me didn't notice the viewport family was treating BSP as dynamic mesh. So the rendering had indeed the exact same data than the offline rendering which was faulty.. Just that the meshes weren't exctly in the same list. NASTY !!..