Thanks Sir,

I tried doing it, but it is not working. I am not sure if i am doing it right. When I solve it, I am getting all the modes at 0Hz and negative mass participation factors, which means the system is still unconstrained. I've attached the screenshots of what I am doing, please correct me if something is wrong.

Thanks Claudio,

That was very informative. My problem is actually that the body-body connections in ansys are not working for deformable bodies (which is my cable in this case). If I set my cable to rigid body (which is a link at present), the solver output shows no errors but I get 0Hz modes which is conspicuous because the body is then rigid. If I set the cable to deformable body, I get the error as shown in attached screenshot.

I've analyzed the same model in SAP2000 and it is showing me that first 10 modes are elastic.

Thanks again for your valuable insights.

Thanks, I'll try with a few different parameters and revert. Can you explain me the error I am getting (last screenshot)?