If checked, horizontal value functions are calculated using zero (0) for parameters with no value/null value whenever possible. Checking this checkbox has no effect on indicator functions.
If the box is not checked, horizontal functions operating on cells containing a null value cannot be calculated. This generates an error message that is written in the function log.
Note: This option does not apply to Advanced Functions as it is possible to correctly treat null values in the advanced code. For more information on advanced functions see Advanced Function, in Working with Categories.