hi
We have a matrix question in which we check the subquestions as follows:

Sub-question validation equation: is_int(this) || is_empty(this) 

This works great! (Only whole numbers or empty values should be allowed). But now we have partially hidden subquestions (via Relevation Eq). If a subquestion is hidden, the question can never be completed correctly.

In short, I should probably have something like this in the Sub-question validation equation:  is_int(this) || is_empty(this) || this.shown

Unfortunately, this does not work.Does anyone have a suggestion how to solve this? 

thx

Can you try is_int(this.NAOK) || is_empty(this.NAOK) ?

thx! that works!

NAOK is done for this.