analysis warning

[aaataha]

Hi

I am trying to perform a site response analysis of a 2D soil model. The soil is modeled using quad elements. During the analysis, I get this warning:

WARNING DOF_Group::setID - invalid location 2 in ID of size 2

What does that mean?

[mhscott]

Do you have beam elements mixed with quad elements in your model? That error may be due to using elements that require more DOFs/node than what you define in the 'model' command.