sketch not visible in other instances

[Obiwalex]

Hello, everyone.
I have an unusual behavior of inventor2012 (64b).
inside a set I double-click on a subaxis of which there are several instances, to be able to make changes. in the browser I extend the knot relative to one of its components and I make visible its sketch. I return to the main axieme, and known with astonishment that none of the other instances has the aforementioned visible sketch. is visible only in the instance that I went to double-click. How come? with inventor 2010 and previous I have never seen such a thing. at the bottom of the basic principle of instances is that each behaves exactly like the others (except for flexible subaxis).
specific that (if it can serve):
0-No subaxieme is flexible and no part has activated the adactivity
1-win7 64b
2-I already installed the sp2 (for 64b) for inventor 2012
3-processor i7
4-8gb ram

Thank you in advance for any disappointment in this regard

 

[Peppe]

in sight -> object visibility have cleared 2d sketches? ?

 

[Obiwalex]

Yes, indeed I will tell you more: in view->visibility->visitability object, I have selected "all working geometries" but the problem remains.
that you know there are some hotfixes that solve the problem? I didn't find it on the autodesk website.
I'm thinking maybe I have to start the installation repair procedure.
What do you think?

soon and thank you.

 

[MauroM]

I don't see it as a problem.
if within an iam I have a thousand equal parts all I am sufficent to make visible a sketch and not all a thousand.
However to make sure to see the sketch in question on all repeated instances should just open the part individually (not together) to make the sketch visible and exit