Missing values for specific rows in matrix when using previousmonth()

[Jonas1]

Hi, 

I have set up an income statement with four rows, total to date, year to date (for chosen month), chosen month and previous month. Year, month, specific project etc. is chosen with different filters.

Everything seems to be working perfectely besides for one thing: if the chosen month does not contain values on any of the rows, there will not be a value showing on that row for previous month either. Does anyone know how to fix this? 

My formula for the provious month is: 

CALCULATE('AllAcTr - Alle Selskap'[Beløp m. Res.];PREVIOUSMONTH(Dato[Date]))

I have set up the total row in the bottom with its own formula, so this is always correct. 

Attached is an example. As you can see the first four rows (income) contains values for the previous month, it does not show however. 

[Jonas1 · Accepted solution]

Finally solved my problem. 

Showed out the reason for my problem was that I had a two-way relation between my date-table and Fact table. When I changed this to a one-way connection everything worked out. 

So seems like the two-way relation made the Fact table filter my previousmonth()-formula in my matrix for detail lines where the value for the current month was zero. Might make sense when I think of it, but took me a long time to realise...

[Jonas1]

Where

Beløp m. Res. = if(HASONEFILTER('Gruppering regnskapskonti'[Res. Type]);sum('AllAcTr - Alle Selskap'[Beløp tab.]);'AllAcTr - Alle Selskap'[Resultat])

Beløp tab. is the value per account just fixed so it will always be positive, while Resultat is the final result (the total).