how do i prevent the default 0(if for example) from passing forward?

[cn_tower]

how do i prevent the default 0(in the case structure for example) from passing forward? (i.e. don't wanna see 0s in my output files)

[Enrique]

cn_tower;

You need to provide more information. Better if you can provide the code for review.

You can always delete a case from the case structure. Right-click on the case and select "Delete case".

Regards;
Enrique