Physically it's not really possible. Ambient occlusion is a shader that returns the proximity to other geometry as a color, black->white. Bump mapping doesn't affect the actual geometry, it just distorts the normals to give the effect of displacement.

This is what displacement mapping does. Here's an example, with bump mapping on the left, and displacement on the right. Image

If you're getting the "error while passing arguments" error, try restarting Maya, and try again.