BandSPDLinLapackSolver

[zemiki]

Hi
I'm having a problem when I run a 3-D model for gravity load. My model is a two way asymmetric 4 story structure with Shear wall modeled with ShellMITC4. It appears to give this warning when running for gravity analysis.
Start of gravity analysis generation
WARNING BandSPDLinLapackSolver::solve() - the LAPACK routines returned 2
WARNING NewtonRaphson::solveCurrentStep() -the LinearSysOfEqn failed in solve()
StaticAnalysis::analyze() - the Algorithm failed at iteration: 0 with domain at load factor 1
OpenSees > analyze failed, returned: -3 error flag


I defined the my gravity analysis as follows:
# =================================================================================================================
puts "Start of gravity analysis generation"
# ------------------------------
wipeAnalysis ;
recorder Node -file L3.out -time -node 24 -dof 1 2 3 4 5 6 disp
# Create the system of equation, a sparse solver with partial pivoting
system BandSPD ;

# Create the constraint handler, the transformation method
constraints Plain ;

# Create the DOF numberer, the reverse Cuthill-McKee algorithm
numberer RCM ;

# Create the convergence test, the norm of the residual with a tolerance of
# 1e-12 and a max number of iterations of 10
test NormDispIncr 1.0e-12 25 3 ;

# Create the solution algorithm, a Newton-Raphson algorithm
algorithm Newton ;

# Create the integration scheme, the LoadControl scheme using steps of 0.1
integrator LoadControl 1 ;

# Create the analysis object
analysis Static ;
analyze 1
puts "End of gravity analysis generation"
## ------------------------------
## End of analysis generation
# ------------------------------
# =================================================================================================================
Thank you in advance for any consideration you give to my question.

[selimgunay]

Did you try it with elastic materials ?

[zemiki]

Is there any way I can model Shearwalls other than THUShell elements? Can I model elastic shear wall elements or by using fiber elements? I changed the column and beams to elastic elements but still, I got convergence errors when doing Pushover analysis or couldn't do Gravity analysis.