Error in static analysis

[heimweg]

Anyone knows what does the following error mean? Appreciate your help.


WARNING BandGenLinLapackSolver::solve() -LAPACK routine returned 1397
WARNING AcceleratedNewton::solveCurrentStep() -the LinearSysOfEqn failed in solv
e()
StaticAnalysis::analyze() - the Algorithm failed at iteration: 0 with domain at
load factor 0.05
OpenSees > analyze failed, returned: -3 error flag

[AHARSHIAN]

Since the failure is in the first step of analysis! it seems that there is a problem with your model or the FEA parameters you considered!

It is my Opinion!

[vesna]

Check your model! It looks like it is unstable. Check boundary conditions and connectivity of your elements. Make sure not to have "hanging" nodes.

[heimweg]

Thanks! I forgot to integrate the torsional stiffness. Now it works.

[kadirtopcu]

how did you solve that problem? could you tell us the details please? how did you integrate the torsional stiffness? thanks

[kavir]

anybody know what's mean below eror?

WARNING BandGenLinLapackSolver::solve() -LAPACK routine returned 2
DisplacementControl::newStep(void) - failed in solver
StaticAnalysis::analyze() - the Integrator failed at iteration: 0 with domain at
load factor 0

[kadirtopcu]

check your model if there is any hanger node. or check your connections. Generally LAPACK problems is about convergence.