> ## Documentation Index
> Fetch the complete documentation index at: https://docs.ntop.com/llms.txt
> Use this file to discover all available pages before exploring further.

# No mesh entities were found in FE Boundary

## Issue:

I'm trying to create an FE Boundary and I ran into the error, "no mesh entities were found." When I change the tolerance, I still get this error.

## Applies to:

* Simulation
* Topology Optimization

## Cause:

If changing the tolerance doesn't resolve this issue, it may be a list error. Make sure your FE Mesh isn't a list. Read up on lists here: [How to work with lists](/help-articles/knowledge-base/user-interface/how-to-work-with-lists)

## Solution:

If your FE Mesh is in a list format, use the block Merge FE Meshes to combine the meshes and get rid of the list. Use this mesh in your FE Boundary blocks and it should work as expected.

## Keywords:

*mesh list boundary entity lists fe combine merge issue tolerance*