Configuration error while filtering on calculated field - Unable to aggregate ratio metrics
I have created a calculated field which is Upper(campaign) from Adwords and used this in a filter. I get a configuration error - Unable to aggregate ratio metrics in the request. Please select another metric.
This error comes for other calculated metrics like cost per completed views etc. I'm unable to understand the reason behind the same. It disappears if I use only Campaign as the filter.
Any help would be appreciated.