Using Forming tool

Hi,

I would like to use Forming tool from Design library. After I made model in Sheet metal through Base flange I draged the element from Forming tools from Design Library but instead of to position the element from Design library it is appeared the message: Are you trying to make derived part? I can not position the element from Design library.

Can anyone tell me where I make mistake?

Thank you in advance!

SolidworksSheet Metal