Hi. This may be trivial question but I am facing errors.

I want to model a X- braced frame with frame members as beam elements and diagonal members as truss elements. The base of the frame is fixed (all 6 dof's = 0). I am applying a lateral load at beam location, but I am getting a "zero pivot error" .

Solver problem. Zero pivot when processing D.O.F. 2 of 1 nodes. The nodes have been identified in node set WarnNodeSolvProbZeroPiv_2_1_1_4_2.

These nodes are on the diagonal truss elements.

Am I wrongly combining beam and truss elements together ? Any suggestions please !