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Regular Visitor

AddColumns fails when adding column to collection from ShowColumns

Using Office 365 Power Apps Version 3.20013.29


The code below performs the following:


vRequestRecords has the columns: "Title", "ItemType", "ItemName", "RequestType", "Revision", ….. and several others.

The function ShowColumns extracts 4 columns ("ItemType", "ItemName", "RequestType", "Revision") from vRequestRecords.

The function AddColumns then adds 1 column ("Title") to the result of ShowColumns.


Until Friday, January 31,2020, it worked without a problem.


Today, February 3, 2020, it shows the error messages listed.


It looks like a Power Apps bug introduced in a recent Office 365 update.





AddColumns(ShowColumns(vRequestRecords, "ItemType", "ItemName", "RequestType", "Revision"),

  "Title", ItemType.Value & ": " & ItemName.Value & " (" & RequestType.Value & ")" & " (" & Revision & ")"





A column named 'Title' already exists.

The function 'AddColumns' has some invalid arguments.

Advocate IV
Advocate IV

It seems this BUG has REAPPEARED.


I too am getting the "Column already Exists" error, for a column that most certainly DOES NOT EXIST.


I also agree with @NasserA

This is inexcusable - especially as it was a big that was previously reported and fixed, and yet is back!


Microsoft - Please fix.




Regular Visitor

Same problem here. How can we solve or circumvent the problem ?

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