See the [TestComplete reference here and here] on setting up exit codes:
"If your tests are run automatically (for example, by using the command line or from a CI system like Jenkins), you may want to get and analyze the TestComplete exit code to check whether your test run has passed or failed.
If your TestComplete project is configured to rerun failed test items, the exit code that TestComplete returns corresponds to the test session status you see in the Summary report. For instance, if a test item fails and then reruns successfully, the exit code will specify that the test session has been successful."
