InfoPath Dev

I am haveing issue making a counter using  count(../preceding-sibling::*/my:Index_Count) + 1.

It almost works but i am not sure how to tweek it get what i need. here is one sequence 3 repeating section nested (How int currently works)

section 1 (1)

     section 2 (1)

             section3(1)

             section3(2)

If this looks like what you're trying to achieve:

Then the formula for your section3 field's default value should be: count(../preceding::my:section3/my:Index_Count) + 1

I attached a sample form for your reference.

Hope that helps!