>In general terms that is not neccessarily so. So what exactly is the code that should assign the value ?

Well, we are talking about a big method here. So, there are a lot of calls to other methods, where in turn, they do the same. So, this is a lot of verification. I have spent two hours yesterday trying to find something. Where I can, I simplify things up. This is always a good thing to do. But, after a while, I have done pretty much what I could do. So, it is kind of difficult to find exactly what kind of situation could cause it.