REST API Versioning

by XDK 19. July 2019 18:48


API version can be specified either in the header of the HTTP request or as a URL query parameter:

HTTP request header: Accept: application/json;api-version=1.0
Query parameter: GET {url}/{organization}/_apis/{area}/{resource}?api-version=1.

Supported versions

Product 1.0 2.0 3.0 4.0 5.0
Azure DevOps Services X X X X X
Azure DevOps Server 2019 X X X X X
Team Foundation Server 2018 X X X X -
Team Foundation Server 2017 X X X - -
Team Foundation Server 2015 X X - - -

Note : Once a preview API is deactivated, requests that specify a -preview version will be rejected (for example, 1.0-preview.1, 1.0-preview.2).



Azure Native DevOps | REST APIs | Azure DevOps on-premises

Link to set global build retention policy for TFS Build and Release

by XDK 23. July 2017 00:06


Team Services: https://<account>

TFS 2017: http://<TFS Server>/tfs/<Collection Name>/_admin/_buildQueue

TFS 2015 Update 3: http://<TFS Server>:8080/tfs/<Collection Name>/_admin/_buildQueue

TFS 2015 RTM: http://<TFS Server>:8080/tfs/<Collection Name>/_admin/_buildQueue#_a=settings


Azure DevOps on-premises | TFS 2015 | TFS 2017 | VNext Builds | VNext Release

TFS cannot find the restored project collection database from other TFS instance

by XDK 27. May 2017 00:13


TF254078: No attachable databases were found on the following instance of SQL Server: <Server Name>. Verify that both the name of the server and the name of the instance are correct and that the database was properly detached using the detach command in the Team Foundation Administration Console.


You may need to check whether the project collection is detached from the other TFS instance properly.

Execute the following query on the problematic project collection database where it is restored

USE <project collection database name>
SELECT name, value FROM   sys.extended_properties 

Check whether the TFS_SNAPSHOT_STATE property with the Complete value is available in the query output.

If you don’t see the TFS_SNAPSHOT_STATE property then the project collection is not detached completely from the other TFS instance properly



Azure DevOps on-premises

How to install Cross-Platform Command-Line Client for TFS on non windows box?

by XDK 20. November 2016 01:40


1. Download the latest Cross-Platform Command-Line Client from the below link

2. Unzip the archive file that contains the client.

3. Configure your shell or system path to include the folder to which you unzipped the archive.

vi ~/.bash_profile

export PATH=$PATH:<Path of the Command-Line client unzipped folder>

4. Save and exit        

5. Execute the below command

source ~/.bash_profile

tf eula -accept

6. At command prompt, type tf, and then press the ENTER key.


7. Set the TF_AUTO_SAVE_CREDENTIALS environment variable to any value, such as "1" to save TFS credentials in the credentials cache. After you set the variable, you do not need to specify authentication information each time that you run a tf command.

8. execute the below command

vi ~/.bashrc 

9. Add the line


10. Save and exit

11. Execute the below command

    source ~/.bashrc

tf get -login:<User name>,<Password>


Azure DevOps on-premises | TFS 2012 | TFS 2013 | TFS 2015

TF400018: The local version table for local workspace <NAME> could not be opened. The workspace version table contains as unknown scheme version.

by XDK 28. July 2016 22:36


TF400018: The local version table for local workspace <Box Name;User Name> could not be opened. The workspace version table contains as unknown scheme version.


This error may occur when the local workspace is corrupted


Delete or rename the local workspace cache folder at "C:\ProgramData\Microsoft\Team Foundation"


Azure DevOps on-premises | TFS 2012 | TFS 2013

About the author

My name is Xavier Dilip Kumar Jayaraj having 16+ years of IT experience which includes solid experience and depth Knowledge in Application Life Cycle Management, Configuration Management, Implementation and Support using TFS on-premises and Azure DevOps. I have invested in gaining DevOps knowledege to expertise with Cloud Computing providers namely Microsoft Azure and Amazon Web Services in recent years. I am very positive to learn and adapt emerging technologies to client’s environment.

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The information provided here is based on my expreriences, troubleshooting and online/offline findings. It can be used as is on your own risk without any warranties and I impose no rights.