Forum Discussion
Help with circular reference calculation
Hello,
I need to perform a difficult calculation on my model and I can not seem to find the answer to this.
The context is:
Every month I have a total cost, but I have a limit on how much I can pay, if the cost exceeds this limit I have to carry the difference to next month.
The problem is that this calculation is giving me the circular reference problem.
Illustration of the problem:
The problem is that the current red row references the previous orange row, which references the previous red row, I have no idea of how to solve this issue on power bi.
Can anyone help me?
Hi Anonymous
What are your original columns? I got Month, Cost, Limit only, then 3 Calculated columns
Difference = VAR CurMonth = 'Table'[Month] VAR T1=FILTER('Table','Table'[Month]<=CurMonth) RETURN SUMX(T1,[Cost]-[Limit]) Previous Month = MAXX(FILTER('Table','Table'[Month]=EDATE( EARLIER('Table'[Month]),-1)),[Difference]) Total = [Cost]+[Previous Month]
3 Replies
Hi Anonymous
What are your original columns? I got Month, Cost, Limit only, then 3 Calculated columns
Difference = VAR CurMonth = 'Table'[Month] VAR T1=FILTER('Table','Table'[Month]<=CurMonth) RETURN SUMX(T1,[Cost]-[Limit]) Previous Month = MAXX(FILTER('Table','Table'[Month]=EDATE( EARLIER('Table'[Month]),-1)),[Difference]) Total = [Cost]+[Previous Month]Works perfectly! I just included an if statement on the difference to yield '0' if negative, this way we won't accumulate negative values at the difference.
If you have the time, could you explain to me why this works ??
I was trying using Calculate(sum(difference, Filter (previous month)) and it was not working, giving the circular error