rendering problem

when i render out an animation sometimes i will have an issue where some faces to the objects flash every other frame. am i modeling incorrectly?

Many things can be occuring there. Maybe you have Shape Keys… Did you mess with that?

Flashing usually indicates ‘z-fighting’ due to overlapping faces, most often from duplicated vertices. Try removing doubled verts from your model in edit mode.

removed doubles already. as soon as i opened it up in the new blender it fixed the isues. not sure how, but it works. thank you for your help