The {0} {1}' has an invalid TablixCorner. The combined CellSpans of the TablixCornerCells within a particular row, row at ...

The {0} ‘{1}' has an invalid TablixCorner. The combined CellSpans of the TablixCornerCells within a particular row, row at index {3}, does not equal the number of TablixHierarchyRows with TablixMembers containing TablixHeaders.