Hello, I am trying to do a flutter analysis in msc patran with msc nastran I started doing a modal analysis of my model, so I constructed a plate model in the structural part, constructed a surface, meshed, created material and create a property shell for that surface.

The problem is when I start the aeroelasticity module, the error in the title appears.

When I run my entire code in the aeroelasticity module, this error appears. The material specified for property "Material Name" has an invalid Constitutive model activated. Check the remaining property values?

Do you have some advice? Do I need define the properties since the structural part, or I can define it in the aeroelasticity part?

Do you have some reference to do a flutter analysis?