When I assembled subassemblies and then I want to delete some parts but I can not delete.
Not the same SolidWorks, I just click part and delete easy.
Can you tell me more.
You must open the Subassembly for editing in order to delete these components. I assume you are in the top level assembly. Click on the subassembly, click edit-in-place, and then try to delete your part. When you are finished, end the edit-in-place and go back to your top-level assembly.