Terrain State is invalid - Terrain MUST be Valid and Triangulated for this tool?????

I created the surface below from my corridor by selecting the 3D elements, but when I attempt to export the surface to a TIN, XML, DTM. I get the error mentioned in the title. How do I go about making this terrain valid? I have already removed rules from this surface.

Thank you

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  • Marc,

    Thank you for the response, I have uploaded the file to the Bentley.sharefile site (overall surface-4-15-2020).

    I have one overall corridor that I am trying to generate a proposed ground for my entire project, I will need to add more surfaces to this model but right now, I cannot seem to get the main corridor exported. I would use the top mesh method, which is what I typically would do to generate a surface, but when I create the surface using that method, the surface triangulation is inconsistent. 

    In the file, I uploaded there is a terrain in there that I created from the corridor elements, but as I mentioned earlier, I cannot export this to a TIN, XML, or DTM.

    Thank you

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