'SAMEPERIODLASTYEAR' expects a contiguous selection when the date column is not unique

Rony21 , I checked out you are not using date table and for time intelligence date table is must having single directional join with your table.

Refer

Why Time Intelligence Fails - Powerbi 5 Savior Steps for TI :https://youtu.be/OBf0rjpp5Hw
https://amitchandak.medium.com/power-bi-5-key-points-to-make-time-intelligence-successful-bd52912a5bd4

Could you please provide more informations about this?

What are you trying to achieve? What is the formula you're using when you get the error?

Hi Rony21 ,

You can refer the following links to try to solve your problem:

DATEADD "expects a contiguous selection when the date column is not unique, has gaps..."

Function 'SAMEPERIODLASTYEAR' expects a contiguous selection Issue

If the above ones can't help you, could you please provide which measure you are using the function SAMEPERIODLASTYEAR in and your expected result? As checked your shared file, I can't find any measure with the error... Thank you. 

Best Regards

Rony21, 

Although it is an old thread, i find an alternative solution for it. Use PARALLELPERIOD to resolve it.
e.g. CALCULATE(SUM(Fact_Sales'AMOUNT'), PARALLELPERIOD(Dim_MTH[MTH], -12, MONTH))