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Thank you. I thought that the displacement control integrator could deal with 0 stiffness.

Hi, I am trying to run a very simple script in order to test the behavior of the elasticPPGap material, unfortunately Opensees returns the following error message: WARNING FullGenLinLapackSolver::solve() - lapack solver failed - 1 returned WARNING NewtonRaphson::solveCurrentStep() -the LinearSysOfEq...