Robert, Can you send me your board file, or a smaller sample that duplicates this problem please. I may have time to look at this within the next day or so.
1) I guess you expect that the DRC should tolerate a clearance of .3mm in your case for this pad to pad situation? 2) What [clearance] should be allowed if they are in the same net (the through hole pad and the smt pad)? Dick
