RPTA0518E

An error has been encountered while launching the test. A required dataset %1 is missing or invalid in your project.

A test contains a link to a dataset that cannot be found or that is corrupted. This can happen when a project is not imported completely, or when a file is deleted.
The test run does not start.
Open the test. On the Common Options page, fix the broken link so that it points to a valid dataset file or delete the link.