Hello everybody,

I need to export reduced stiffness matrix in static nonlinear deformation analysis. I have added the following lines at the end of my input file. However, when I import the inp file, I get the warning in the message box that these keywords are not yet supported by the input file reader.

I would really appreciate if someone could help me with it.

Thanks in advance.

** ----------------------------------------------------------------

**

** STEP: SubstructureGeneration

**

*Step, name=SubstructureGeneration, nlgeom=YES

*Substructure Generate,Type=Z1,Library=R_0010,Overwrite

**

*Retained Nodal Dofs,Sorted=YES

"corner_nodes", 1,3

**

*Boundary,OP=NEW

**

*Substructure Matrix Output,Stiffness=YES,

Output File=USER DEFINED,File Name=KM

*End Step