Undesired unplated VIA

Hey guys,

I just finished doing a 4 layer board for a project, and when I generate the gerber files, DS makes 2 NC drill files, one for the plated holes and one for the unplated. The thing is, I want all my vias to be plated. Is there any way to find which via is unplated (cannot go through all of them since there are more than 300...). When I run the designRulesCheck it also says 'yes' at the unplated via sentence.

Thanks a lot