Forum for OpenSees users to post questions, comments, etc. on the use of the OpenSees interpreter, OpenSees.exe

Moderators: silvia, selimgunay, Moderators

Post Reply
Posts: 72
Joined: Fri Jul 10, 2009 3:05 am
Location: Griffith University


Post by talebian.s.e » Mon Nov 16, 2009 2:18 am

Dear Dr.silvia Mazzoni

I have modeled a 3 story frame.After running this error occurs :

WARNING BandGenLinLapackSolver::solve() -LAPACK routine returned 12
WARNING NewtonRaphson::solveCurrentStep() -the LinearSysOfEqn failed in solve()
StaticAnalysis::analyze() - the Algorithm failed at iteration: 0 with domain at
load factor 0.1
OpenSees > analyze failed, returned: -3 error flag

BandArpackSolver::Error in dgbtrf_
Warning FrequencyAlgo::solveCurrentStep() - the EigenSOE failed in solve().
EigenAnalysis::analyze() - algorithm failed
missing function argument at _@_
in expression "pow(_@_,0.5)"

What could they be?

Posts: 3912
Joined: Tue Jan 11, 2005 7:44 am
Location: Degenkolb Engineers

Post by silvia » Mon Nov 16, 2009 9:18 am

are you trying to do an eigenvalue analysis?
the system is unstable....
Silvia Mazzoni, PhD
Structural Consultant
Degenkolb Engineers
235 Montgomery Street, Suite 500
San Francisco, CA. 94104

Post Reply