Model not assembled : position violation (from Solidworks models)

Good afternoon everybody !

I have got some problems with Simulink but i don't know how to solve them. I have imported two different Solidworks models and i want to connect them. Here a picture of my simulink model :

The error is : "Model not assembled : position violation". This error appears when i connect them. Even i remove the "weld joint" the error still appears.

Thank you in advance.