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ERROR: Error on Jacobi solver: matrices are not positive definite with Declarations4.Solvers.EigenValuesSolver.Jacobi()

When starting the elastic analysis of a model with a dynamic load, the error below appears:

Solution 1

  • Verify the stiffness properties of the elements: check if the sections and material properties are well defined. If an element has no stiffness, it shouldn’t be modelled in Diamonds.

Solution 2

This error cal also be caused by a malfunction in the load groups.

  • Remove all load groups besides Self-weight and Seismic.
  • Regenerate the combinations and calculate the structure using only┬áthose two load groups.
  • If this calculates, define the load groups again one by one. Regenerate the combinations and calculate the structure between each addition.

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