Instablity (type 3) Having a roof as a rigid diaphragm

[navid.fathi]

Hello! I am fairly new to robot. I have followed the basic modelling concepts however I cannot wrap my head around how to probelm solve instabilities. 

My roof is is a supposed to act as rigid in order to avoid bracing on the roof. However I still get a instability. I have added bracing on the building therefore I see no need to add bracing on the supports

Can someone help me? 

Regards

[navid.fathi]

Attaching robot file

[Krzysztof_Wasik]

Hi @navid.fathi 

I think this warnings can be ignored. Refer to

Instability type 3

[Stephane.kapetanovic]

hi @navid.fathi 

there are a lot of irregularities in your model. The posts are not straight, the panels are not flat and not contiguous. To see this, you need to go to preferences to increase the number of decimal places for the length unit.
you will see that behind the centimeter your coordinates vary from 2 to 5mm which is sufficient for the model not to consolidate sufficiently.

Best Regards

[Stephane.kapetanovic]

After that you can ignore instability but you must be careful to the results...

[Stephane.kapetanovic]

https://forums.autodesk.com/t5/robot-structural-analysis-forum/rounding-up-coordinates-api/m-p/34305...

[Stephane.kapetanovic]

is this topic solved ? Please answer or accept the solution.   Best regards