TC shows random string where git branch is normal shown

here is a screen that shows what i'm talking about

http://screencast.com/t/Wn7lcrbl3Lq

What version of TeamCity do you use?

We just upgraded to 7.1.5 from I'm assuming 7.1.4. However it is still happening after the upgrade.

How these builds are triggered?

In this case manually, i.e the 'Run' button. We have config properties that show a dialog box, so we enter a branch (e.g. v24). We have some builds that are triggered on vcs changes but we haven't seen this problem with those.

When you trigger custom build and TeamCity determines that some of parameters will affect version control settings it must present you with warning about auto branch. Do you see this warning? It is only shown if teamcity.build.branch parameter is not specified. If this parameter is specified TeamCity must use value from this parameter.

I'm not sure what 'auto-branch' is and No, we've never seen any such warning. If we run the build and do not enter a value for branch when prompted, the build will still attempt to run. Although there is no regex to enforce a value for the branch property, the actual build script requires it and the build will fail without it.

p.s.

we're not using teamcity.build.branch parameter. we have defined a 'branch' build parameter that is a prompt so we can enter a branch name.

Ok i think I'm seeing now this warning you mentioned, however i've never seen it before. I assume this is new in 7.1.5?

It was added in version 7.1.1. It's strange you did not see it before.

It is possible we were using a version prior to 7.1.1. Can we disable that notification?

You can control branch marker in build with help of teamcity.build.branch parameter. If this parameter is specified, TeamCity won't show this warning.

We don't have build configurations for every branch which i assume is the intention with teamcity.build.branch ?

Is there some documentation on that parameter? What it is for and how it is supposed to be used?

Branch specific parameters are described here: http://confluence.jetbrains.com/display/TCD7/Predefined+Build+Parameters#PredefinedBuildParameters-BranchProperties
teamcity.build.branch actually works both ways. If it is specified in build manually - it affects branch label of the build. If it is not specified, TeamCity will generate branch label automatically and set this parameter. This behavior currently is not documented, and we're looking for a better solution.