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Aymane's avatar
Aymane
Frequent Visitor
4 years ago
Solved

The XIRR function is not working

When trying to use the XIRR function, an error saying "The XIRR function couldn't find a solution" pops up. My data has both negative and positive values and also starts with a negative value and whe...
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  • OwenAuger's avatar
    OwenAuger
    4 years ago

    Aymane Thanks for that 🙂

     

    First of all, can you test this:

    1. Create a simple table visual containing Dimension_Date[Today] and XIRR_Calc2.
    2. Do you see the cashflow values that you are expecting to feed into the IRR calculation?

    If so, you could rewrite the XIRR measure as:

     

    XIRR =
XIRR (
    VALUES ( Dimension_Date[Today] ), -- OR Dimension_Date
    [XIRR_calc2],
    Dimension_Date[Today]
)

     

     

    If not, the logic may need to be rewritten in some way, either by modifying XIRR_Calc2 so that it returns the required cashflow when grouped by date, or adding some logic to the XIRR measure.

     

    There are a couple of points to consider here:

    1. Iterating over a fact table with XIRR will likely give an unexpected result, due to the risk of duplicated rows. For this reason (and performance reasons) it's best to iterate over a dimension table (or dimension column).
    2. We need to ensure that XIRR_Calc2 returns the expected values for each row of the table provided in the first argument.  Given that there is some complexity, with vMin and vMax being evaluated within the measure, there might be some tweaks required.

    To explain further:

    With your current XIRR measure, the XIRR_Calc2 measure is being evaluated in the row context of every row of Fact_TransactionBuckets. Due to context transition (since a measure is being evaluated), each row of Fact_TransactionBuckets is converted into an equivalent filter context, and if there happen to be any duplicated rows, things could go awry (good article on context transition here).

     

    Regards,

    Owen

Aymane's avatar
Aymane
Frequent Visitor
4 years ago

Hi OwenAuger , Thank you again for your solution.

 

I have another issue regarding the same problem, after calculating the XIRR, I need to create a visualization table where XIRR is filtered by another column(AssetClass) in another table (Dimension_Asset).

Usually, all the calculations I've made have been done on the Fact_TransactionBuckets which has an AssetKey that connects it with the Dimension_Asset, however, since the Dimension_date Table (Where the XIRR was calculated) doesn't have a direct relationship with Dimension Asset, the XIRR can not be filtered by the column AssetClass.

 

Can you please suggest a solution that doesn't involve adding or changing anything in the model?

OwenAuger's avatar
OwenAuger
Super User
4 years ago

You're welcome Aymane  🙂

 

If your data model has been set up the way you've described, with Fact_TransactionBuckets related to both Dimension_Asset and Dimension_Date, then filters on either of those dimension tables should filter Fact_TransactionBuckets and the XIRR measure should respond accordingly.

 

To help me understand the issue, could you post a sanitised version of the PBIX with dummy data?

 

I wasn's sure what you meant when you say the calculation was does "in" the Dimension_date or Fact_TransactionBuckets tables? The measure does reference those tables, but it should return the same result regardless of its home table.

 

Also just want to check I've understood you correctly and you have created a measure rather than a calculated column.

 

Regards,

Owen