Please provide us with some more information.
Please check this LINK:
Also try this step:
Open your project in AE, click on Edit>Purge>All Memory & Disk Cache
If your original footage is MPEG compressed then just decoding it can cause problems with the camer tracker. You also need to make sure that your app is up-to-date. To run a quick test to see if the footage format (codec) is the problem drop your original footage in the Adobe Media Encoder and render out a JPEG image sequence. Try importing that image sequence and tracking that. Just be careful to make sure that the frame rate of the imported image sequence matches the frame rate of the original footage by checking the file interpretation.