Hi once again, I'm trying to create view, which would show the student how many lessons he has completed from specific course. I was able to find the Quiz Results: Lesson State-field which gives me the information that I'm looking for. (example picture http://i.imgur.com/PqJqFHC.png) After this I tried to use the aggregation to COUNT value of that field for the progress, but I received error message: SQLSTATE[42S22]: Column not found: 1054 Unknown column 'og_membership.target_id' in 'field list' SQLSTATE[42S22]: Column not found: 1054 Unknown column 'quiz_node_results.quiz_state' in 'field list' Is there something wrong with the files or am I missing something obvious (probably this one)? Any tips you can give? Thanks!