Hi Ina,
I have been checking your project.
I recommend you to start by dividing your projects into sub parts.
so start first with Data1 only in the system. then check the output and match it with Data1.
afterwards, add Data2. then try to check the output matched with Data1 and Data2.
At this point, you can add Data3 and get the output of Data1 and Data2 and Data3.
by this procedure, you will be able to minimize the source of errors.
hope that helps you move forward.
let us know if we can help in anything else.
thanks
Mohamed