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Hello, I would like to consider a beam column joint element. As first step, on the basis of Mitra and Lowes element (BeamColumnJoint2d), I tried to implement a new one just changing the name of the element and adding the OPS procedure. Unfortunately I got the following error: "Matrix::Solve - n...

Thank you for your help! I did some change in my file following the indication of "Add a New Element C++" (http://opensees.berkeley.edu/wiki/index.php/Add_a_New_Element_C%2B%2B) and "Truss2D.cpp" ((root)/trunk/DEVELOPER/element/cpp/Truss2D.cpp). I found the error message "OP...

Hello, I would like to consider a new structural element with 4 nodes, 4 rotational springs and 12 degrees of freedom. I believe that there are some mistakes in the OPS procedure that I wrote at the beginning of the .cpp file. The OPS procedure is #ifdef _USRDLL #define OPS_Export extern "C&quo...