Need Help: Simplify3d doesnt see the model as one?

[AVTBI]

Hey,

Im new to the whole 3D printing scene so i definetly dont know what ive done wrong here.

On both sofrware i used the exact same model. I added the pins on meshmixer.
Cura slices the model as one but Simplify3D sees the pin and the model as two separete models. Why and how can i fix it?

[Nancy]

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