Choose on option how the build number should be provided to SilkCentral Testmanager:

• Don't care about a build number: No buildnumber is used to start the test execution. It depends how SCTM is configured, but typically the execution definition are configured with a build number, which is used for the execution. Form more information read the documentation of SCTM. This option should also be used if you write a 'buildinfo-file' by your own.
• Use build number from this job: Simply execute the test execution on SCTM with the current build number of the hudson job.
• Use build number from top upstream job: For this option the build number of the top level upstream job is taken for the test execution on SCTM.