[FLUENT] Attempting to OGrid but Failing
 

Hello,

I am trying to run a simulation of fluid flow past a cylinder in the middle of a wind tunnel scenario. At this point, I have completed blocking and am beginning to mesh and refine these meshes. One of the ways I am refining the blocks is to implement an ogrid. Based on a tutorial for meshing around a car model, I have selected the blocks inside and below the cylinder in order to implement an ogrid. But, these attempts have failed with the error message "ogrid failed."

Essentially, what am I doing wrong?

Thank you,

JEA