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GOT IT !!! Small mistake in boundary condition.

Thank you.

Yes, I tried I am getting this error:

FullGenEigenSolver::solve() - the eigenvalue 1 is numerically undetermined or infinite

Yes. I added but the same error persists. I tried with one more mass -> massv = [1,1,1], then the error is: ArpackSolver::Error with _saupd info = -9999 Could not build an Arnoldi factorization.IPARAM(5) the size of the current Arnoldi factorization: is 1factorization. The user is advised to check t...

Now the error changes
It says starting vector is zero

ArpackSolver::Error with _saupd info = -9
Starting vector is zero.
WARNING StaticAnalysis::eigen() - EigenSOE failed in solve()
WANRING failed to do eigen analysis

Sorry for that. I have given a pinned BC at the second node now.
But still it gives an error.

ArpackSolver::Error with _saupd info = -3
NCV must be greater than NEV and less than or equal to N.
WARNING DirectIntegrationAnalysis::eigen() - EigenSOE failed in solve()
WANRING failed to do eigen analysis

Dear sir, I am trying to do a simple column buckling analysis. I am getting some errors. Can you kindly help me out. My code: import openseespy.opensees as ops import openseespy.postprocessing.Get_Rendering as pst ops.model('basic','-ndm',2,'-ndf',3) ops.node(1,0,0) ops.node(2,0,10000) ops.geomTrans...

Ok. Thank you. I will do that.

Yeah, you are right. I could directly give 2 node link element with multilinear material property. But how do i differentiate if the multilinear material takes stress - strain or force - displacement? In documentation it's given it can be anything ! Moreover the reason I want to include the whole el...

Thanks for your response. I will try to describe my formulation. I have a Cold Formed Steel wall-panel frame (an assembly of 4 "pin jointed" beam-column elements in a rectangle forming a mechanism). Now, the wall-panel has a sheathing board which is connected to the frame through fasteners. When a l...

Dear sir, This may be a weird question but kindly answer this. Is it possible to include user defined member stiffness matrix into OpenSees? For example, taking a simple 2D frame, in a FEM software we generally discretize the frame into elements (beam-column elements) which have their own shape func...

Yeah. I got it.
It is in "tclAppInit.cpp"

Thank you. Now I am able to comprehend a bit.

Thanks for the resources.

But still I am unable to understand how 'main()' is missing?

Thanks a lot. It is working now. I am beginning to learn how OpenSees works. I am surprised to find that there is no 'main()' function in these source files. Can you please tell me how the whole thing works? I mean, how it is getting compiled and I am getting an executable (opensees.exe)? At least d...

Thank you. I was able to build OpenSees 3.2.0. But after loading it shows this message: application-specific initialization failed: Can't find a usable init.tcl in the following directories C:/Users/ashok/Desktop/OpenSees-3.2.0/OpenSees-3.2.0/Win64/lib/tcl8.6 C:/Users/ashok/Desktop/OpenSees-3.2.0/Op...

Dear sir, I am trying to build OpenSees-master->win64->OpenSees.sln file. But I am getting repeated error -> " Cannot open included file: 'tcl.h':No such file or directory . I have installed Active Tcl and I have included the path for 'tcl.h' in -> c++->General->additional include directories and Li...