Hey Everyone,
I’m a new user of OpenSees Navigator and I am using it to do a research for my Master’s thesis. I already have the model of a high-rise steel building on SAP2000 and I imported the .s2k file to OpenSees Navigator. I checked the model and added the MPconstraints. I am trying to run a modal analysis to check the eigenvalues and modal frequencies and I am getting these warnings (for many nodes but I just pasted some of them):
WARNING PlainHandler::handle() – constraint matrix not identity, ignoring constraint for node 1
non-varyng assumed
and then I get:
WARNING BandGenLinLapackSolver::solve() -LAPACK routine returned 1
Could anybody help me figure out what the problem is? I’d really appreciate any help,
Thanks!