Hello,   I have a big dataset with 3 values that are of interest. ID, Visite and WSL_Flaechen. Visite ranges from 1 to 5 and WSL_Flaechen from 1 to 2. With the following code i managed to group by Visite and count the WSL_Flaechen for each ID. But instead i want count of WSL_Flaechen (blue arrow) to be multiplied with the value of WSL_Flaechen (red arrow) and display the sum of that for each ID. So ID 4001 has (1*8 + 2*12) = 32 on Visite 1 and 2 + 20 = 22 on Visite 2 and 26 on Visite 3 and so on... The dataset only has 1s and 2s and the WSL_Flaechen field and i cant seem to just sum them up. I only display the count of 1s and 2s in seperate fields. How to i properly use the sum function here? When i try to get sum in there i get the "statistical variable other than N without analysis variable" error.   Sincerely, Keets ... View more