error message

amarnath · Post by **amarnath** » Mon Feb 11, 2008 2:37 am

Hi
I performed gravity and eigen analysis got the following error can any one please tell me what does it mean?
BandArpackSolver::Error in dgbtrf_
Warning FrequencyAlgo::solveCurrentStep() - the EigenSOE failed in solve().
EigenAnalysis::analyze() - algorithm failed
WARNING LagrangeSP_FE::LagrangeSP_FE()- no asscoiated Node
child killed: SIGABRT

Thank you

silvia · Post by **silvia** » Mon Feb 11, 2008 10:24 am

likely,
your structure is not well constrained, your eigenvalue analysis failed.

amarnath · Post by **amarnath** » Wed Feb 13, 2008 2:37 am

Thank you Silvia. Last time I did not give restraints for the master node
Now my code is running. But there is another problem. I am analyzing 3 story 3d building with rigidDiaphragm so it should have 3 DOFS at each node leading to total 9 DOFS. If I am doing analysis using
eigen generalized 4
I am getting four eigen vectors
but If I give any value more than 4 then it is giving the following error message.
Could you please tell me what is the problem?
BandArpackSolver::Error with _saupd info = -9999
Could not build an Arnoldi factorization.IPARAM(5) returns the size of the curre
nt Arnoldi
factorization. The user is advised to check thatenough workspace and array stora
ge has been allocated.
Warning FrequencyAlgo::solveCurrentStep() - the EigenSOE failed in solve().
EigenAnalysis::analyze() - algorithm failed
Model Built
OpenSees >

Amarnath

silvia · Post by **silvia** » Fri Feb 15, 2008 8:21 am

are all eigenvalues unique?