Deepak Kumar Mishra, Support Engineer, EMEA TFS team brings this known issue in TFS 2015 RTM with Churn report data in excel is not displaying the Work Item relationship.
We checked the table dbo.factworkitemChangeset in Tfs_Warehouse and it was empty.
[AFTER TFS 2015 UPGRADE] Code Churn report data in excel is not displaying the Work Item relationship.
[BEFORE UPGRADE ]This was working prior to upgrade. Below is the screenshot of the data before upgrade to TFS 2015.
This issue has be resolved in Team Foundation Server(TFS) 2015 Update 1 and the same has been confirmed by product group as well.
Written by: Deepak Kumar Mishra, Support Engineer
Reviewed by: Nitish Nagpal, Support Escalation Engineer