Modal Analysis of a beam

I am trying to do the modal analysis of a beam. I did the modal analysis in Ansys to check the results, for the same frequency range, the same material properties and the same boundary conditions Ansys finds only 6 modes, while matlab finds more than 750.
Matlab imports geometry strangely, I don't know if that has anything to do with ituntitled.jpg
AnsysResults.jpg

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I am facing the same problem. Have you managed to detect the error?

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