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"There was a problem combining geometry together" message when modifying solids in Fusion

Technical Support

Issue:

Users reported that while using the Combine, Press/Pull, Chamfer, Extrude, Cut, or Boundary Fill feature on solid bodies in Fusion, the following message appears:

Error

There was a problem combining geometry together.  If
attempting a Join/Cut/Intersect, try to ensure that the bodies
have a clear overlap (problems can occur where faces and
edges are nearly coincident). 
 
Fusion message There was a problem combining geometry together
There was a problem combining geometry message in Fusion
 

Causes:

Invalid geometry of one or both of the bodies.

Solution:

In direct modeling, repair the geometry with validate feature

Fusion Validate Dialog


For parametric modeling, use the timeline to find and repair the geometry

  • Inspect the model closely to find any unexpected surfaces or intersecting geometry. Select the problem areas in the model to highlight where they were created in the timeline and manually repair them.
  • Review the timeline warnings and errors to track the invalid geometry and repair it (see: Resolving Timeline Warning or Errors in Fusion).
  • If an extruded sketch was used to create one of the solid bodies, edit the sketch and make sure it is a closed loop.
Closed vs Open Sketch in Fusion.

When working with imported geometry

  • This can also occur when using imported geometry, such as .STL, .DXF, or .SVG files. These files are prone to high face and edge counts that may cause extrusion failures or the creation of invalid geometry. Use solid models or native geometry to perform boolean operations instead. 
  • When importing from another program, try another file type. If Fusion is able to convert the file (instead of importing a .STEP, for example), the result may be better.

Restitch a body

Try unstitching the affected body and stitch it again.

Products:

Fusion;

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