'NoneType' object has no attribute 'XObject'

[xgx]

Dear STKO team, can you give me some advice to deal with the problem as the following picture

[STKO Team]

I need the full error (in your image I cannot see the last lines).
But I'm pretty sure you did not assign a physical property to some geometries

[xgx]

I need the full error (in your image I cannot see the last lines).
But I'm pretty sure you did not assign a physical property to some geometries

Thank you for your reply, and the information you need is in following picture

[STKO Team]

Exactly, as you can see from the last line, one of your beam elements (either disp or foce based) are missing a physical property

[xgx]

Exactly, as you can see from the last line, one of your beam elements (either disp or foce based) are missing a physical property

Thank you very much, I have fixed the problem according to your advice.
Best wish to you

[STKO Team]

You're welcome