inventor 2024 does not take sketch references in the set

[s.melotto]

Good evening,
in a set I created a sketch to calculate the position of closed piston leverisms....
I would like to take a discrete point to bind the lever to the right point; I should bind the center of the red circle to the axis of the pipe of the pink piece.
I tried taking sketch point and pattern - tried to create an axis on the point to bind axis and pattern. . .
but does not take the sketch in any way!!!! I don't understand if it's an incorrect setting or if I'm wrong or if you can't just do it as I use a sketch element to bind my model into the axieme? ?
I don't understand why he doesn't. ! ! !
(same asm, I created an axis on a sketch belonging to a part of this together and, then, I bound created axis and geometry of the model together.... and it works; nnon understand xe in one case it does but in the other not)
Thank you.

 

[Peppe]

sketches together do not allow to use geometries as an entity for constraints.
to do what you ask you have to have a part (fittizia) with inside the sketches on which you can use all geometries to place the constraints