> Any idea ?
Wow, that sounds like ThumbsPlus is forgetting to add that table when it converts a .TD4 database!
If you would like to fix this manually:
Download and install Alex Nolan's excellent and free [link=http://www.alexnolan.net/software/mdb_viewer_plus.htm]MDB Viewer Plus[/link]
[*]Open the .tpdb8 database in MDB Viewer Plus
[*]Click on the Tables button
[*]Click New
[*]Enter the desired Table Name and the Field Names, Data Types and Field Sizes exactly as in the image below, and make 'key' the Primary Key.
[*]Click Create to finish this operation.[/list]
Note 1: To be safe, keep a backup of your original database!
Note 2: A full specification of the ThumbsPlus 8/9/10 database structure in PDF format is available [link=https://dl.dropboxusercontent.com/u/11281844/ThumbsPlus-9-database-structure.pdf]HERE[/link].