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Dear STKO team,

Thank you very much for your insights and comments.
I only returned now to office after a work leave due to a family issue.

I have addressed all the issues of the model and it looks now that I am able to get the modal parameters, but I obtained very low frequencies compared to the ...

Thank you very much for your insights, I completely understand that the O-snap tools can cause such issues.
To get a quick resolution on the issue, I used the 'Repair Fix' command in STKO with 10^-2 tolerance (in this large model it is acceptable). I lost material assignment on some surfaces after ...

Sure, please find the model attached below (I have attached it as image file to be able to upload it, but you still will be able to open it in STKO).

Thank you again for your time!

Thank you for your prompt reply. That is exactly what is happening, when I mesh it, I can see that a handful of surfaces are transparent and unable to be meshed. And, yes, they are also indicated in the terminal.
To resolve it, I removed all these surfaces and re-draw them, but the issue persists ...

Hello STKO team,

I am developing a model for a mixed masonry-RC building. The model was initially imported from AutoCAD and only then I modified some details. All the masonry walls are represented by the TC3D damage model including an RC wall. The RC beams and columns are represented by fiber cross ...