I have created a component and used the iPart table fuction to control the size and number of features. 
 
I then created a drawing and placed the first view.  I used the first part from the table which happens to be the same version open in the part file.
 
When I try to retrieve dimensions, the GUI window opens and I select the part but dimensions do not show up. 
 
This doesn't seem to happen in drawings of a single component, those not using the iPart function.
 
Please advise.