Post Processor plan view error

Hi, I have a model with 2 waterbodies. For some reason the post processor plan view only shows the branches in the second water body. I get an "Error # 11 was generated by W2_Post3 Division by zero" when I try to look at the branches in the first waterbody. Has anyone had this issue? Could something be wrong in my bath files? The model seems to run fine and looks fine in the W2_Control bathymetry viewer. Thanks, Jim