The TestComplete Test Visualizer captures images of your tested application for operations performed during test recording and playback. These images, as well as other helper Test Visualizer files, are stored in the Visualizer\<TestName>_<TestExtension> subfolder of the folder containing your test. Here, TestName is the name of your test as you see it in the Project Explorer panel, and TextExtension is the extension of the test file on the disk (see Project and Project Suite Files for possible extension values).
When you rename a test, TestComplete also renames the folder containing the Test Visualizer data for the test. Likewise, when you save the test to another location, TestComplete moves the folder with the Test Visualizer data to the appropriate location.
If the destination folder already exists, TestComplete attempts to rename that folder appending the ~ symbol to its name, so that it is then possible to move the folder with the Test Visualizer files to the needed location.
This message appears if TestComplete is unable to rename the existing destination folder. The problem occurs, for example, if some files stored in that folder are locked by another application, or if the user account under which TestComplete is running does not have appropriate permissions to rename that folder. In this case, TestComplete leaves the folder containing Test Visualizer files in its original location. As a result, the Visualizer images will be missing from the test, since the images’ location on the disk no longer corresponds to the test file location.