You have not provided enough annular ring for the via. You have two choices...you can increase the Via PAD size or decrease the Via DRILL size. Either way, you are likely going to want to edit the current via structure or create a new via and replace the existing deficient via. You can do that using the Padstack Editor. Start with Tools...Padstack...Modify Design Padstack Then, the easiest way, but likely more expensive way, is to drop your drill size such that you can achieve at least a 6 mil annular ring. I would be a good idea to save this via with a new name.... like Via18_6 where 18 is the pad size and 6 is the drill size. Substitute with your actual values. Then you will want to do Tools...Padstack...Replace and replace your old via with the new via you just created. Hope that helps... Tom
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