Schedule Trigger not firing

It looks like your branch definitions may be incomplete in your VCS Root settings. You'll need to use the complete path for your branch in these fields, depending on which type of VCS you're using. For example, a Git repository would need to use "refs/heads/dev". The Branch Specification field in your VCS Root will set up the Logical Branch Name that you're referencing in the trigger settings. 

It may be helpful to review the documentation here: https://www.jetbrains.com/help/teamcity/working-with-feature-branches.html

I have updated my settings, but it still can't work.

Here's my settings:

VCS：

Default branch: refs/heads/%env.BUILD_BRANCH%

Branch specification: +refs/heads/dev

Schedule Trigger:

Edit Branch Filter: +refs/heads/dev

Parameters:

env.BUILD_BRANCH: dev

Do you have more than one VCS Root on this build configuration?

No, I have only one

Using the same VCS Root and trigger settings, it seems to work reliably for me. Are you able to run the build manually by clicking on the Run button?

Are you able to run the build manually by clicking on the Run button?

=====

Yes, it works fine. VCS trigger and Schedule trigger(manually) are both work for me.

Would you mind sharing updated screenshots with your new settings?

It looks like you're missing the ":" in your branch spec and filter fields. Try using "+:refs/heads/dev". 

Oh, thanks, I saw it. After I fix the branch filter, it works.

But... it can't work if I add trigger rule.

VCS trigger and Schedule trigger(manually) are both work where this trigger rule.

I added more than one rule like '+:dir/**'

Eric Borchardt Thanks, now the trigger is working fine!