If you customize the format, you will need to specify the rows and columns to import items accordingly.
Import Entities and Attributes from Excel
Go to [Tools] – [ER Diagram] – [Import ER models from Excel].
A dialog box appears.
Select the file you want to import and then click [Import].
The supported format is the Entity Definition Report exported by Astah (From [Tools] – [ER Diagram] – [Export Entity Definition Report] or sample template).
By default, it imports as a logical name. If you’d like to import both logical and physical names, choose the second option and specify the row and column.
When import completes successfully, a confirmation dialog opens. Click [OK].
To create an ER diagram with imported models, select a ER Model in the structure tree and click [Auto Create ER Diagram].