Failed to load viewstate. The control tree into which viewstate is being loaded must match the control tree that was used to save viewstate during the previous request. For example, when adding controls dynamically, the controls added during a post-back must match the type and position of the controls added during the initial request.
One possibility is that the query that selects the count and the query that selects the fields are in disparity. The count query must return the number of rows that would be returned by an unlimited field query.
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