in reply to warning while opening excel sheet

This is a known error. Google knows about it at writeexcel data may have been lost. This was discussed recently in Re: erron in spreadsheet::Write Excel, where a workaround was found.

From comparing the text of erron in spreadsheet::Write Excel to your post, I assume that you are the same person. So why do you think that asking almost the same question five days later will be met with other answers than before?