When TestComplete runs a project suite, it runs the projects included in this project suite and selected for the run on its Test Items page. After the project run is finished or interrupted, TestComplete checks whether the project log contains any errors. If there are errors, TestComplete will either stop the project suite test run or continue with the next project depending on the Stop on Error value on the page:
To obtain this property value from tests, you can use the ProjectSuite.TestItems.TestItem.StopOnError property.
See Also
Controlling Test Execution Flow
Test Items Page (Project Suite Editor)