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Helper I
Helper I

Issue using Group By within Dataflow.



Issue using Group By within Dataflow, how to fix it?


Steps to reproduce


Power BI Service > Workspaces > Dataflows > Create Dataflow > Define new entities > OData > Enter Business Central 261 G/L Entries OData URL.


Remove all columns except:




Highlight Posting_Date > Transform > Date > Month > Start of month




Group By > Advanced > Group By all except Amount, SUM Amount




After that it throws the following error:


Expression.Error: The key didn't match any rows in the table.DetailsKey = [G_L_Account_No = "6100", Posting_Date = "2020-04-01", Dimension_Set_ID = 123]
Table = #table({"G_L_Account_No", "Posting_Date", "Dimension_Set_ID", "Amount"}, {})

Tried the same Group By using Document Date > Transform > Date > Month > Start of month which also produces the same error.


Doing a Group By without a Date columns works perfectly well, but I need the Posting Date 😞


Before Group By the Posting Dates shows perfectly well, no errors.


How can this be fixed?? Any suggestions please?








Super User
Super User

@Landcrab - Not sure, love the handle though.


You could check the Issues forum here:

And if it is not there, then you could post it.

If you have Pro account you could try to open a support ticket. If you have a Pro account it is free. Go to Scroll down and click "CREATE SUPPORT TICKET".

@ me in replies or I'll lose your thread!!!
Instead of a Kudo, please vote for this idea
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DAX is easy, CALCULATE makes DAX hard...

Thanks @Greg_Deckler  - Will do that. For now will leave this post open and hopefully be able to come back and post link to or actual solution here 🙂

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