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15. January 2013
Asp.Net , C#
"Sys.InvalidOperationException: Could not find UpdatePanel with ID ''. If it is being updated dynamically then it must be inside another UpdatePanel."
Generally this error comes when you are trying to update an UpdatePanel from code behind and that UpdatePanel is inside an element (parent) that has hidden visibility.
Some techies suggest you to use another UpdatePanel as a container of your this UpdatePanel. Keeping in mind that UpdatePanels are the region like PlaceHolders and not like asp.net Panel element. [More]