Hello, iam new to the forum.

I have been working with solidworks for some time. Recently I started working with simulation fluit and i got a problem.

I think I did everything right. Put a cilinder over the moving part, select de cilinder in component control and disable it (see picture).

Insert > rotating region... and select the cilinder.

Here starts the problem i cannot select rotating region. In the picture the rotating region button is shown grey, so there must be something blocking it.

I hope I gave enough information and hope you guys can help me

Thanks in advance, sorry for my english.