SqlBuildTask failed due to ArgumentNullException(searchingPaths)

At one of my customers, they have setup TFS 2010. They are using the UpgradeTemplate.xaml to build all their solutions, including GDR2 database projects. When building the project, I got the following error message

DspBuild:
  Creating a model to represent the project...
C:\Program Files (x86)\MSBuild\Microsoft\VisualStudio\v9.0\TeamData\Microsoft.Data.Schema.SqlTasks.targets(58,5): error MSB4018: The "SqlBuildTask" task failed unexpectedly. [C:\Builds\9\62\Sources\MyDb\MyDb.dbproj]
C:\Program Files (x86)\MSBuild\Microsoft\VisualStudio\v9.0\TeamData\Microsoft.Data.Schema.SqlTasks.targets(58,5): error MSB4018: System.ArgumentNullException: Value cannot be null. [C:\Builds\9\62\Sources\MyDb\MyDb.dbproj]
C:\Program Files (x86)\MSBuild\Microsoft\VisualStudio\v9.0\TeamData\Microsoft.Data.Schema.SqlTasks.targets(58,5): error MSB4018: Parameter name: searchingPaths [C:\Builds\9\62\Sources\MyDb\MyDb.dbproj]
C:\Program Files (x86)\MSBuild\Microsoft\VisualStudio\v9.0\TeamData\Microsoft.Data.Schema.SqlTasks.targets(58,5): error MSB4018:    at Microsoft.Data.Schema.Extensibility.ExtensionAssemblyResolver..ctor(List`1 searchingPaths) [C:\Builds\9\62\Sources\MyDb\MyDb.dbproj]
C:\Program Files (x86)\MSBuild\Microsoft\VisualStudio\v9.0\TeamData\Microsoft.Data.Schema.SqlTasks.targets(58,5): error MSB4018:    at Microsoft.Data.Schema.Extensibility.ExtensionTypeLoader.LoadTypes() [C:\Builds\9\62\Sources\MyDb\MyDb.dbproj]
C:\Program Files (x86)\MSBuild\Microsoft\VisualStudio\v9.0\TeamData\Microsoft.Data.Schema.SqlTasks.targets(58,5): error MSB4018:    at Microsoft.Data.Schema.Extensibility.ExtensionManager..ctor(String databaseSchemaProviderType) [C:\Builds\9\62\Sources\MyDb\MyDb.dbproj]
C:\Program Files (x86)\MSBuild\Microsoft\VisualStudio\v9.0\TeamData\Microsoft.Data.Schema.SqlTasks.targets(58,5): error MSB4018:    at Microsoft.Data.Schema.Tasks.TaskHostLoader.LoadImpl(ITaskHost providedHost, TaskLoggingHelper providedLogger) [C:\Builds\9\62\Sources\MyDb\MyDb.dbproj]
C:\Program Files (x86)\MSBuild\Microsoft\VisualStudio\v9.0\TeamData\Microsoft.Data.Schema.SqlTasks.targets(58,5): error MSB4018:    at Microsoft.Data.Schema.Tasks.TaskHostLoader.Load(ITaskHost providedHost, TaskLoggingHelper providedLogger) [C:\Builds\9\62\Sources\MyDb\MyDb.dbproj]
C:\Program Files (x86)\MSBuild\Microsoft\VisualStudio\v9.0\TeamData\Microsoft.Data.Schema.SqlTasks.targets(58,5): error MSB4018:    at Microsoft.Data.Schema.Tasks.DBBuildTask.Execute() [C:\Builds\9\62\Sources\MyDb\MyDb.dbproj]
C:\Program Files (x86)\MSBuild\Microsoft\VisualStudio\v9.0\TeamData\Microsoft.Data.Schema.SqlTasks.targets(58,5): error MSB4018:    at Microsoft.Build.BackEnd.TaskExecutionHost.Microsoft.Build.BackEnd.ITaskExecutionHost.Execute() [C:\Builds\9\62\Sources\MyDb\MyDb.dbproj]
C:\Program Files (x86)\MSBuild\Microsoft\VisualStudio\v9.0\TeamData\Microsoft.Data.Schema.SqlTasks.targets(58,5): error MSB4018:    at Microsoft.Build.BackEnd.TaskBuilder.ExecuteInstantiatedTask(ITaskExecutionHost taskExecutionHost, TaskLoggingContext taskLoggingContext, TaskHost taskHost, ItemBucket bucket, TaskExecutionMode howToExecuteTask, Boolean& taskResult) [C:\Builds\9\62\Sources\MyDb\MyDb.dbproj]

Solution

To solve this error you set the MSBuild Platform in the Build Defintion to X86: