To Add a Table to the MSCATALOG Table

Open the Database Setup (MSCATALOG) dialog (Drawing > Attach > Database > More split button).
From the dialog's Table menu, choose Add to MSCATALOG.
The Add Table to MSCATALOG dialog opens.
From the Table Name option menu, choose the table to add. This will become the tablename value in the MSCATALOG row for the table.
In the Entity Number field, key in a unique entity number for the table. This will become the entitynum value in the MSCATALOG row for the table.
Click the OK button.
Note: Alternatively, update MSCATALOG through the database software.