silverlight - Error With DataPager and DataGrid/DataForm -

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Do anyone know what this error is? When I'm on more than 161 pages in a datagreat, I get it.

The system. Unauthorized Operation Exception: When there is an item verification error or its edit and autocomitor is wrong then the currency can not be changed

Check the data from which it is being binding and see what is wrong with the number of rows (80 * rows per page) and (81 * per page rows)


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