Tuple Index Out of Bounds Error

Hi all,

So I was trying to model a PWR assesmly. I created the root universe and geometry but while exporting it to xml file, I get the error stating that the ‘tuple index out of bounds’.
I tried to solve it by giving each universe in the model a universe_id and the root universe as id of ‘0’. But still I’m getting the same error.
Please provide a solution to it.
Thank You in Advance.

Regards
Shubham

Can you provide as simple of an input model as you can that reproduces the issue and that you are comfortable sharing?

Thanks,
Adam