To repair objects, from the Geometry toolbar, Defeaturing and Repair () menu, select Repair (). You can also right-click the Geometry node and select the same option from the context menu.

From the Input objects list, choose Manual (default) to select the objects you want to repair in the Graphics window. Click the Activate Selection button to toggle between turning ON and OFF the Input objects selections. Alternatively, choose All objects to select all objects or choose All nonconstruction objects to automatically select all objects that have not been marked as Construction Geometry. If the geometry sequence includes user-defined selections above the Repair node, these will also be available in the Input objects list.

Enter the Absolute repair tolerance that is used by some of the repair options as detailed below.

With the Fix errors checkbox selected (default) the software tries to repair the following geometric and topological errors:

Select the Repair face-to-face inconsistencies in solids checkbox to try to repair solid objects with this fault reported by Import, Check, or Repair features.

Select the option Simplify curves and surfaces to also simplify within the Absolute repair tolerance the underlying curve and surface manifolds of the geometric entities. Repairing objects with this option may improve both the performance and reliability of geometric operations on some imported geometry, for example it may help in some cases when Boolean operations on the imported objects fail. Simplification means that the manifolds are converted where possible to analytical form: linear, circular, and elliptical curves; and planar, spherical, cylindrical, conical, and toroidal surfaces. Manifolds that are converted are B-spline curves and surfaces, or certain surfaces generated by operations such as sweeping, revolving, and filleting.

The Delete small details checkbox is selected by default to remove geometric details smaller than the Absolute repair tolerance. Details that can be deleted include short edges, sliver faces, small faces, and spikes.

With the Heal edges checkbox selected the operation tries to replace edges with a large tolerance with accurate edges calculated by intersecting the adjacent surfaces. This also improves the adjacent vertices, which become exact.

If the Minimize tolerances checkbox is selected any tolerant edges and vertices on the geometry are detected, and if possible their tolerances are reduced.

When the option Check resulting objects for errors is selected (default) the repaired objects are checked for remaining problems. Warning nodes appear with details about the detected problems, if any. Use the Zoom to Selection button next to the Entities list in a warning node to locate the problematic edges or faces. For information on geometry problems see the Check feature.

If you want to make the resulting entities contribute to a cumulative selection, select a cumulative selection from the Contribute to list (the default, None, gives no contribution), or click the New button to create a new cumulative selection (see Cumulative Selections in the COMSOL Multiphysics Reference Manual).

Select the Resulting objects selection checkbox to create predefined selections (for all levels — objects, domains, boundaries, edges, and points — that are applicable) in subsequent nodes in the geometry sequence. To also make all or one of the types of resulting entities (domains, boundaries, edges, and points) that the resulting objects consist of available as selections in all applicable selection lists (in physics and materials settings, for example), choose an option from the Show in physics list: All levels, Domain selection, Boundary selection, Edge selection, or Point selection. The default is Domain selection, which is suitable for use with materials and physics defined in domains. For use with a boundary condition, for example, choose Boundary selection. These selections do not appear as separate selection nodes in the model tree. Select Off to not make any selection available outside of the geometry sequence.

From the Construction geometry list choose On to make the resulting objects available only in the feature’s geometry sequence. The default option Inherit from input means that the resulting objects become construction geometry if all input objects are construction geometry. Choose Off to never output construction geometry objects. For more information see Construction Geometry in the COMSOL Multiphysics Reference Manual.