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Selecting surfaces with Surface Segments gives no options

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Old   February 29, 2020, 18:59
Default Selecting surfaces with Surface Segments gives no options
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I'm trying to apply surface constraints on my part with Surface Segments. When opening the surface selection dialog box, no options are listed.

I have split the geometry part up so that the surfaces I want to constrain are isolated from the rest of the part, and they are already recognized as surfaces/boundaries in the region. I'm confused why there are no eligible surfaces to constrain. Is there restrictions to what kind of surface can be selected?
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Old   July 10, 2021, 06:50
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In case anybody faced the same issue, I solved this problem deleting the interfaces associated with the part surfaces that I wanted to select
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constraint, fixed, segment, star-ccm, surface

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