Find out here how to create a SQL database for project management
EPLAN Recommendations
Make sure that your logged-in Windows user is stored in the SQL Manager. Alternatively, keep the username and password for the SQL-System Admin Account wide.
Make sure that your used user System Admin or at least DB Owner has been assigned rights to create databases from EPLAN.
Make sure that your EPLAN Client reaches the SQL server via the network.
Make sure that the SQL Server service and the SQL TCP/IP connection are running.
Create a database
On the ribbon, select the File tab > Backstage Settings settings > User > administration > project management database.
In the "SQL Server" area, activate the checkbox and select the + button (New).
Now create your new SQL database.
Enter your SQL server name and instance.
Select the desired login to connect to your SQL server.