Error with non linear analysis

[nany717]

Hi, 

Can some one please explain what does the following error means ? And what should I do to avoid it. 

I have a multistoried model, and I want to use P-delta analysis type. So, I have converted the analysis type of my simple load cases to Non Linear PD.

Do I have to convert the combinations as well !? 

Thanks

[Artur.Kosakowski · Accepted solution]

You should create manual combinations instead of code combinations. You can either generate them automatically in the similar way as code combinations or convert  code combinations into manual combinations prior to changing the analysis types.

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