Hi CPQ Experts, 

Did anyone tried a summary variable at Quote Line Group level. 

I see "Target Object" field is a pick list for Summary variable object and adding "Quote Line Group" isn't working. 

Not sure what i am missing there.... as we have requirements to put some validation like 1 Bundle per Group, which i am trying to do with Product rule as

In which, the complexity is we have a quote line which is specific to Promotions (where the sku's will be standalone not bundles)...rest of groups are eligible to contain bundle sku's 1 per group.