Software Applications Programming Errors and solutions.

When your requirements were simply to detect repeated occurrences of the value in Column C, I suggested using conditional formatting with the formula: =MATCH(C1,C:C,0)<>ROW(C1) Now you have extended the requirements to detect only those cases where the description (in Column D) is different. That simply means extending the formula to something like: =AND(MATCH(C1,C:C,0)<>ROW(C1),OFFSET($D $1,MATCH(C1,C:C,0)-1,0)<>D1) The point is that you can achieve the desired results entirely with nothing more than a conditional format.