Get Model Sketch and Vault

[Ktelang]

Hello,

The Issue which I have is similar to this but going I have some more problem.

http://forums.autodesk.com/t5/Autodesk-Inventor/Get-Model-Sketches-not-working/td-p/2762308

In my case:

The model sketch is an assembly sketch which is adaptive, the assembly is an iassembly.

We use Vault 2012 to handle our data. The drawing when created with a base view and

I can get the model sketch it shows up well when I check that drawing in and check it out the

sketch is gone and the option to get is back is greyed out

Is this due to Vault or due to some option which I am missing

Any help will be appreciated.