The selected faces must be coplanar. If you select faces that are parallel but not coplanar, try using Up to face.
Example
In this example, the selected faces are parallel but not coplanar. In the PropertyManager, if you delete the circular face from Selected entities and select it for Up to face, FeatureWorks recognizes the triangular extrude.
Example
In this example, the selected side faces are parallel but not coplanar. Try selecting the end faces, which are coplanar, instead of the two side faces.
| Side faces |
End faces |
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