I just upgraded to the latest "Cells" (4.4.3.1) from the old version (v3.8.1.0). Now the same sheet will not open and throws the following error: This Excel files contains BIFF7(Excel95 or earlier file format) record…...Product Family walt_schwarz May 1, 2008, 10:54am 1 I just upgraded...sheet is attached... amjad.sahi May 1, 2008, 11:54am 2 Hi Walt, Thanks...