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Thank you fmk. Then, we should conclude that the bi-linear material cannot be updated during the analysis?

I am using the following commands for updating for updating the alfaCap value of element 1:
parameter 1 element 1 section 1 material 1 alfaCap
updateParameter 1 $value
I receive the following error:
"Parameter::addComponent 1 -- no objects were able to identify parameter "
Any ideas?

Thank you very much for your reply. It was a great help. I would appropriate it if you could help me a little more. I am using the the Bilin material (Modified barra-Medina-Krawinkle deterioration model: "uniaxialMaterial Bilin $matTag $K0....") for plastic hinges. I need to update "$...

Hi,
I have modeled a steel frame with BeamWithHinges elements. I am performing a time-history analysis on the frame and I need to update the the material behavior of the elements during the analysis. Is it possible to do it with opensees?How can I do it? Any idea? Please help me...