Web Intelligence on Bex Queries - Some objects are highlighted and not availiable to merge

Hi All,

I'm creating a report on Web Intelligence based on two Bex query and noticing that some of the mergable objects are highlighted/In bold letters and the merge option is greyed out for both of them. I have experienced this in the past as well and back then I was not able to use the highlighted objects as Input controls.

This behaviour often occurs when using Bex queries, I've not had a single instance when using Universe on Webi as such. Can anyone enlighten me on what triggers this to occur and is there a way to prevent this from happening.

Please refer to the screen shot attached for a quick look on how the objects apper to me .

Thanks

Gaurav Bhatt