By default waiting time of BI Connector for response from OBIEE Server is set to be 5 minutes. If the response is not received within this specified time, BI Connector will throw time-out error. 

If your execution of report will take longer time, you can increase this time out period by following the below steps.

Step 1: Open “ODBC Administrator” and click on “Configure” button of the DSN that you created for connecting Tableau with OBIEE.

Step 2: Press Alt+V to open the advanced settings dialog box as shown below.

Step 3: Click on Use Custom http timeout in minutes checkbox to enable it and in the text box, type the number of minutes that you want to wait for response from OBIEE Server.