Team Foundation Server 2018 Data is Null

[Imransh21]

Hi All,

I am trying to configure Team Foundation Server 2018 with SQL server but i am getting an error at readiness check validation

" TF255407: An error occurred while attempting to validate the configuration database. Error message: Data is Null. This method or property cannot be called on Null values."

I already have TFS setup running on one of the server which is currently live and its working fine. I want to setup one more server to test the backup of TFS data, so for that i have installed same version of TFS i.e. 2018 and SQL server 2016. Below are all the activities which i have performed.

• Running TFS Instance Details.

1. TFS Version: 2018
2. SQL Server: 2016 SP1
3. OS: Windows server 2019
4. TFS DB's:
   • Tfs_Configuration: 1.5 GB
   • Tfs_Projects: 48 GB
   • Tfs_Products: 24 GB
   • Tfs_AppDevelopment: 29 GB
   • Tfs_Migration: 7 GB

• New Server Details.

1. TFS Version: 2018
2. SQL Server: 2016 SP1
3. OS: Windows server 2016

All above db backups i have restored on new server. Installed TFS 2018 and when trying to configure i am selecting existing deployment.

Regards

Imran Shaikh

[#2]

 hello Imran did you managed to solved your issue I have the same @Imransh21 

[#3]

Hi Nissim,

So sorry for replying you so late.
Yes i was able to resolve this issue, there were entries of deleted collections in TFS configuration database table. I deleted that entries and issues was resolved.
@@Nissim_Acheroff