I had a workbook that was working fine on 10.3. We upgraded to 2018.2 last week and I get the following error:
"ERROR: Column 'Extract'.'GL_Code' is not available after aggregation
I figured out that the issue occurs due to one calculated field called B_Header. It is calculated as follows:
IF A_Header = something THEN something
ELSEIF C_Header = something and A_Header = something THEN something
Now, A_Header is the calculation that uses GL_Code. It is calculated as follows:
IF GL_Code = sometthing THEN something
ELSEIF GL_Code = somethingelse THEN somethingelse
Yes, I agree that we could have used Groups, but can someone please explain why this is causing the error?
I do not see a known issue similiar to this one posted or documented. Have you created a ticket with Tableau Support at support.tableau.com?