Catia V5 Offset from plane

[who8myrice123]

Hey guys, I'm fairly new to Catia V5 and I am currently working on a pre-made assembly CATProduct file. I'm trying to create a plane using Plane Definition > Offset from plane. Once the face I want to offset from is selected, I click on the Plane icon to open up the Plane Definition. I then click the drop down menu and select "Offset from plane". But whenever I do, the face I want to use is deselected and becomes unselectable. What am I doing wrong?

I followed the exact same steps in this video as well:

https://www.youtube.com/watch?v=x_PctXf04sA

But it doesn't work when I use the CATProduct file. It DOES work when I make my own CATPart file and create any model with a face, but not with CATProduct. Help?

 

[lardman363]

You have to make geometry in a part.

 

[lardman363]

Also just thought you have to double click the part you want to add the plane to. You cannot be active on one part and pick a plane from a different part. Also, if you pick a surface that ts non planar, you cannot offset a plane from it.

 

[who8myrice123]

Thanks lardman363! I already made a geometrical set, so I guess the surface was just non planar.