Reset Variables For Each Pass Through For Loop

I am having trouble defining a variable in a For loop. When I run the loop the first time everything seems to work fine, but when the loop goes back through the second time it carries its previous value with it. Here in lies the problem if the variable is supposed to be empty (not assigned a value). So, for example: 'Variable' in the code below may or may not be given a value depending on the conditions in the For i loop. If it is given a value then 'Variable' will still have that value on the next pass through the For j loop. And if none of the conditions are met for the If statement in the For i loop the second time through the For j loop, it should be an empty variable, but instead the code is reading it as having a value (from the previous pass through the For j loop).

[Code] .....

I have tried using:

[Code] .....

After the For j line, and instead of using:

[Code] ....

I tried using:

[Code] ....

and I've tried:

[Code] .....

I get an Object error with either line I use. I just want to be able to reset the variables each time through the For j loop so in the case of an empty variable, it doesn't try to calculate based on the previous value.