Hello!!

I am trying to split a part(a car mirror) which I've designed it into an assembly,so I've designed the left mirror into the assembly,saved it as a separate part and for time sake I want to mirror it, So, I opened the new part.sldprt and made a new plane which would be used as the reference plane and as a trim tool for split. After mirroring the part I activated the split command and tried to save the cut bodies individually but the result is that split command failed.

Can someone take a look at it please?

Thank you in advance guys!!