About Duplicated Violations
Clearance and Creepage Analysis reduces the number of violations it reports by eliminating duplicated violations. Duplicated violations connect the same region between the same pair of surfaces. A region is a connected component of a surface bounded by one or more contours. The violations for a pair of nets after a Clearance and Creepage Analysis are said to be duplicated if they satisfy the following criteria:
• They have the same violation distances.
• The two components between which the violation distance is calculated are the same.
The algorithm to identify distinct violations relies on some heuristic methods. Thus, it may not always recognize some paths that you consider as duplicated.