Thank you again!!
I have looked those but it seems that we are in a different situation altogether, we face the challenge only by opening the sheet and to display it starts the calculation automatically, even though we have marked the calculation as manual.
One more thing, all this is in offline mode, we have not yet logged in to the BI platform.
I have saved the worksheet on my desktop. I open the AO , click on file open and open the sheet and it takes all the time to render.
Though if I just open excel and then click on file open, it comes in few seconds.
Shrutika.