Hello All, 

I activated a section cut through my model (although the model contains couplings and connectors, the subject section cut is not through anything like that, just through C3D solid elements). Then I activated the free body toggle, and I whenever I do this I receive the warning below. 

Can anyone help me understand this warning further? Is this saying that my specific current freebody is segmenting a incomplete stress field? Or just that the model in general contains a incomplete stress field. What is a incomplete stress field in this context?

Any help would be greatly appreciated. 

Thanks all!

 Abaqus ​​​​​​​