TestComplete displays this message when you commanded it to update a Test Visualizer frame from screen, and it cannot update that frame.
To store each Visualizer frame, TestComplete uses two files: the .png image file that stores the image and the .7z archive containing the .xml file that stores information about objects displayed on the image. This message is displayed when TestComplete fails to update the .xml data file. This can happen for the following reasons:
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The file is read-only. For instance, the file attribute can be enabled by the source control system when you check in project files. If you use a source control to store project files, check them out from the source control before updating Visualizer images.
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The image file is locked by some other application. For instance, it can be locked by an XML editor or viewer, or by some program that is copying project files to another location.