InfoPath Dev

 Hello everyone,

 I have a several lists in individual sections posing as print-pages. If one lists reaches the set max number of rows, the next section(contianing the next lists) becomes visible. In the first section I want to have a field which gives the total of all the visible lists. If I set the field's value to add up all the lists numbers it adds the hidden ones, too.

So my idea would have been to account for the hidden fields by subtracting those from the total and change the field's value es soon as the hidden sections get turned visible. However, setting a field's doesn't work. I think I would need to change the fields formular so that it'd keep updating itself. Does anyone know how to change a fields formular?

 Or is there a nicer, less convoluted solution?

I wish I could better understand your phrase: 
" I want to have a field which gives the total of all the visible lists" 

A list is a set of fields (and rows, basically a table, and you want to have a total of all fields in a few lists?

 Looking back, my post is quite unintelligible...

  I've added a simplified example.

 I have two sections with tables in it, a button and a invisible field called "SwitchPage". As long as "SwitchPage" has a value of 0, the second section is hidden. If you press the button, "SwitchPage" gets set to 1 and the second section appears.

Now the repeating tables have two columns. The user will enter numbers in the second column. I want to add a "total sum"-field that displays the total of all the numbers added in the second column's fields. However, I don't want it to count the numbers in the second section as long as this section is hidden(or "SwitchPage" is set to 0 - same deal, really). This is a problem because both repeating table's number fields have a default value(in this case 5). So when I set my "total-sum" field to sum up all the fields in both second columns it will display 5 more than I initially want because it's already counting the value of the - as of yet - hidden field/table/section.

In your case, this should do the trick:

sum(field2) + sum(field5) * SwitchPage

 Oooh!

Of course... nice solution, thank you!