I think you didn’t define the property for some element. If you upload your CAE file, maybe I can help you better.

Rania Elsebai Can you share your Abaqus model (.inp)?

I attached my file

kindly check the annex

thanks in advance Nils Wagner ,@ Mehdi Karimian

You assigned a truss section to a part (wire), but used beam elements in the mesh for this part. You should use truss elements in the mesh. Go to the mesh--> element type and assign the correct mesh.

Really thanks Mehdi so much

ok Mehdi Karimian I am gonna do that and get back to you

Mehdi Karimian It just solved the second error but still have the first error,

I attached what I got after modification

I think you don’t need to use material orientation because all of your materials are isotropic. However, if you want to use material orientation, you should apply it once for each part. It seems you have applied it twice for some parts, like the foundation. Please check this for all parts.