I'm trying to create the following sheet metal flange geometry as a feature that I can add to a sheet metal part. Inserted on an edge.

Essentially, I started with a base flange that represents the edge reference I would insert the feature on. Then the library feature would include Edge-Flange1 through LPattern2. I added a few equations to determine the amount of holes to pattern depended on the edge length, (called wall length).

• "Wall Length" = "Wall Length Ref@Sketch16"
• "Pattern Spacing" = = .3
• "Pattern Number" = = int ( ( "Wall Length" / "Pattern Spacing" ) / 2 )

The pattern is two directions hence the last /2.

"Wall Length Ref@Sketch16" is a driven dim included in Edge-Flange1 to reference the wall length that the feature is inserted on.

When I try to create the library feature it gives me the following warning:

Does this mean that I can't make a library feature out of sheet metal features? Or am I just missing something?