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what to do on the node betweet beam and truss elements?

what to do on the node betweet beam and truss elements?

what to do on the node betweet beam and truss elements?

(OP)
HI all, I'm new here.
I have some warning      (negative eigenvalues;Solver problem. Zero pivot when processing D.O.F.)
in my model because i don't know how to link truss and beam elements(maybe in the node of contact?).My part look like a cage of 1D elements of steel( all elements are continuous).
I need some help please, thanks :)

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