SAMEPERIODLASTYEAR NOT WORKING

[Anonymous]

Hi.

I have created a calculated measure using the function SAMEPERIODLASTYEAR but somehow I got the "contiguos date selection" error and I don't know how to fix this.

Thank you for your help.

Daniel Kataoka.

[Ed_T]

Adding this solution in case others had the same experience as me.  I was getting the 'Function 'SAMEPERIODLASTYEAR' only works with contiguous date selections' error message on a file that had updated monthly for the past year without issue.  The error appeared after refreshing the data with a dataflow.  During fault finding I tested refreshing the file on a colleague's laptop and it worked fine so I knew I had an issue with my laptop rather than the file itself.

The solution on my laptop was a simple clearing of the Excel cache.  As soon as the Excel cache was clear, the file refreshed without the error message coming back and everything worked fine again.

[v-easonf-msft · Accepted solution]

Hi， @Anonymous 

SAMEPERIODLASTYEAR  is a time-intelligent function, so it is recommended to perform this function on a calendar table containing consecutive dates.

Make sure you use  

 CALCULATE([Measure], SAMEPERIODLASTYEAR(Calendar[Date]))

rather than

 CALCULATE([Measure], SAMEPERIODLASTYEAR(Facttable[Date]))

You can also try using filter and DATEADD . The dates returned by SAMEPERIODLASTYEAR  are the same as the dates returned by this equivalent formula: DATEADD(dates, -1, year)

Other related threads:

Function 'SAMEPERIODLASTYEAR' expects a contiguous selection Issue 

Contiguous date selection error - YTD LY 

sameperiodlastyear only works with contiguous date selection 

Best Regards,
Community Support Team _ Eason

[amitchandak]

@Anonymous , You should always use a date table, joined with your table on a date having a single directional join.

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
To get the best of the time intelligence function. Make sure you have a date calendar and it has been marked as the date in model view. Also, join it with the date column of your fact/s. Refer :radacad sqlbi My Video Series Appreciate your Kudos.

[Anonymous]

Hi, @amitchandak.

Tks for your answer.
I already have a date table joined with my fact/s but I also created another table called SpecialDates where I joined with the column date from the date table.

The SpecialDates table is a table with custom dates: all months (jan, feb, mar, apr..) and anothers custom dates (Last Month, 1 Semester, 2 Semester, YTD, Full Year..)