Addcolumns (columnname + i) with names depending on variable

[Anonymous]

Greetings, 

I mtrying to create a function that adds columns based on the numbers available in the column "Chronologie", the problem is that ADDCOLUMNS  does not accept my variable , and I have this error : ADDCOLUMNS  needs a name as an argument number 2.

As a result I want to have these columns 

 " Date soumission + VAR Listechronologie" : "Date soumission 1" , "Date soumission 2" ....

You ll find a screenshot with the optimized code with the error and the "step by step" code but working.

Thanks in advance

This is the code that I wrote:

@amitchandak @Greg_Deckler 

[Greg_Deckler]

@Anonymous Can't use a variable that way. Could probably get there using GENERATE but would need sample data pasted as text to mock it up. Sorry, having trouble following, can you post sample data as text and expected output?
Not really enough information to go on, please first check if your issue is a common issue listed here: https://community.powerbi.com/t5/Community-Blog/Before-You-Post-Read-This/ba-p/1116882

Also, please see this post regarding How to Get Your Question Answered Quickly: https://community.powerbi.com/t5/Community-Blog/How-to-Get-Your-Question-Answered-Quickly/ba-p/38490

The most important parts are:
1. Sample data as text, use the table tool in the editing bar
2. Expected output from sample data
3. Explanation in words of how to get from 1. to 2.