That message means you are currently showing 4254 items (for the tab you have selected) in the CMP list window out of a total of 12018 items identified in your assets.tdx index file, a number that is way too low. When I select the Installed tab (to show the number of builtin items plus the number of items that I have downloaded and/or created) in my CMP, it shows I have 23284 items of 82988 items displayed. The current size of my assets.tdx file is 14283 KB. If you delete the assets.tdx file and restart CMP it will rebuild and should get to 82988 or higher.
Bob