Error when use a declaired variable.

Hi

I get the following error message: Field not fount: Tempdateat line 15, column 23. it is the line:

         "if EndDate >= TempDate then"

in the code below. I have declared the variable with the let statement but I get the error in the if statment. What is the problem ?

if text(Repeating) = "Yes" and text(Done) = "Yes" then
      if text(RepeatType) = "Daily" then
            let TempDate := Date + number(RepeatFrequencyDay);
            void
      end;
      if text(RepeatType) = "Weekly" then
           if text(RepeatFrequencyWeek) = "Every week" then
                let TempDate := Date + number(RepeatFrequencyWeek) + 7;
                void
           else
                let TempDate := Date + number(RepeatFrequencyWeek) * 7;
                void
           end
     end;
     if EndDate >= TempDate then
          Done := "";
          Date := TempDate
     end;
     closeRecord()
end