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Dear Team,

What is the right procedure to remove or add elements from the model In STKO? Because every time I remove some elements from my model, it shows an error as given below. but if I make the same model from the beginning with an element removed, then there is no occur.
It is a little difficult to make the same model again and again in order to make some changes.

Regards,
Zeeshan Bhat

Dear Zeeshan,

The error you are showing is telling you that you erased the element which contained the control node for the displacement control integrator. You need to either recreate the node, or choose another one and add it to the selection set for DisplacementControl.

As for the procedure to remove elements from an existing model in STKO, I would say it is good practice to retrace your steps every time you decide to erase a geometric element from the model. This can be tricky especially with interactions, which could lose the reference to the nodes. When you copy existing geometry for example, element and property assignments could get lost.
I found that it always better to restart from the geometry and go through the whole model once again, just checking that everything is still were it should.

Enjoy your modeling.
Francesca