Sampat Kumar
Ansys Employee

Hi 
There could be multiple reasons for this. If the geometry errors are present in the SC then try to remove them. 
1. Try to keep all 4 beam parts in the single component and core parts in the other component in the SC then transfer them into the mechanical. 
2. I can see there are 5 parts under the carbon component in the geometry tree, try to suppress the extra bodies in the mechanical and see if it worked for you or not. 

Best Regards,
Sampat

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