Archive for December, 2015

TFS Build: Unable to load task handler PowerShell for task …

While I was trying run a TFS build for the first time on a Windows 2008 R2 SP1 machine, I got the following error

Unable to load task handler PowerShell for task Maven with version 1.0.13

To determine the Powershell version that is installed on your system:

Open Windows Powershell

Type $PSVersionTable.PSVersion

If you have a version that is lower than 3.0, you will need to update to a recent version of Powershell

In my case, I had PS 2.0 installed. I upgraded to PS 4.0 which I downloaded from

and that fixed my issue

PS: read the installation instructions to determine proper file name to download


Categories: ALM, TFS2015 Tags: , , , , ,

Release Management: Communication with the deployer was lost during the deployment (The parameter is incorrect)

At one of my clients, I got this error on Release Management 2015:

Communication with the deployer was lost during the deployment. Please make sure (1) the deployer machine has not rebooted during installation and (2) the component timeout is sufficient to copy the files from the drop location to the deployer machine and install the package.


The Release Management database was migrated from environment to another following the steps at

I didn’t migrate the machine key because we are only migrating the database and not the server.


Open the Deployment Agent log. The default location should be at


Where <user> is the user who initiates the build (e.g. your username, build_service user, etc)

In my case, I had the following error

{“ErrorMessage”:”The parameter is incorrect.\r\n”}
12/14/2015 9:20:32 AM – Error – (9528, 9260) – Error while converting string to XDocument: [Data at the root level is invalid. Line 1, position 1.] [   at System.Xml.XmlTextReaderImpl.Throw(Exception e)
at System.Xml.XmlTextReaderImpl.ParseRootLevelWhitespace()
at System.Xml.XmlTextReaderImpl.ParseDocumentContent()
at System.Xml.Linq.XDocument.Load(XmlReader reader, LoadOptions options)
at System.Xml.Linq.XDocument.Parse(String text, LoadOptions options)
at Microsoft.TeamFoundation.Release.Common.ExtensionMethods.XmlExtensionMethods.ToXDocument(String value, Boolean preserveWhitespace)].

The error doesn’t give a lot of information.

On the Release Management server, take a look at Release Management Services log which is located at

C:\Users\<RM user>\AppData\Local\Temp\Microsoft\ReleaseManagement\14.0\Logs\ReleaseManagementServices.log

Where <RM user> is the username of the RM account


In the ReleaseManagementServices.log, I saw the following error

Request http://rmserver:1000/account/releaseManagementService/_apis/releaseManagement/TfsService/DoesBuildExists?tfsServerId=1&teamProjectName=Services&buildDefinition=MyBuild&buildNumber=BuildName- threw exception: System.Security.Cryptography.CryptographicException: The parameter is incorrect.

The CryptographicException caught my attention. I visited the Release Management release definition and there was an encrypted password field.


Reenter the password in the password field and start new  a release