Seismosoft | Earthquake Engineering Solutions

Hi,
I have tried to create a model utilising infill panels within a RC frame but when i am running an Eigenvalue analysis i am getting an "Unknown Error" with all the outputs stating either an "Imaginary or null eigen-solution".

Is this common and is there something I would have done wrong for this to occur?

Thanks,
Dan

Dear DanThomas,

I would suggest you to check the elements connectivity.

You may find models with infills in SeismoStruct's verification report models and in SeismoBuild and SeismoStruct Sample models (https://seismosoft.com/seismobuild-seis ... le-models/) to check how infills should be connected to the structure.