Analysis error: cannot find option attribute

[Ostinelli]

Hello.
I'm trying to do a simple plastic (fiber) analysis of a simple supported steel beam (IPE200), subjected to a uniform load.
But after the analysis, I select a NewtonWithLineSearch and toll=1e-07, there is this warning: cannot find option attribute..someone can help me please?
Thank you in advice

[STKO Team]

You cannot assign a Fiber or Elastic section directly to a Disp or Force BeamColumn element.
You first have to create a physical_property->special_purpose->BeamSectionProperty, where you choose the section and the integration scheme.
Then you assing this property to the beam

[Ostinelli]

Okay that's fine.
Now another error is shown...it's a problem of convergence..
Is there a lineguide to use resolution algorithms? It' a basic plastic analysis of a simple supported IPE200, subjected to an uniform distributed load..
Is it correct to select for this type of non-linearity a fiber section right?

[STKO Team]

Is there a lineguide to use resolution algorithms?

We made many webinars about highly nonlinear models.

It' a basic plastic analysis of a simple supported IPE200, subjected to an uniform distributed load..
Is it correct to select for this type of non-linearity a fiber section right?

Yes