Hi All, I have a problem that is puzzling to me. I was wondering if any of you could help explain it to me. I have two vertically parallel metal with the dimensions as shown below. <-0.85um-> <-0.85um-> |--------| |--------| ^ | | | | | | | | | | | | | | | | | | | | | | | | | | |<-0.75->| | 9.9um | | um | | | | | | | | | | | | | | | | | | | | | | | | | | | | |--------| |--------| ^ WIDTH[R] M1 LT 10.01 M1temp LENGTH M1temp GT 0.75 OUTPUT BIGM1 60 7 I am confused as to how many errors I should get or no errors at all. Please tell me if my interpretation is correct here. The WIDTH check returns a total of 4 edge pairs --- 2 pairs for each polygon. The R option should have created 2 trapezoids total --- one for each two edge pairs. The trapezoids should now be the exactly the same as the original polygons. Then the LENGTH check should return 8 errors for the 8 edges where every one of them is greater than 0.75um. Please tell me if this is correct. If so, then it means that the Dracula file that I'm using has implemented the rule incorrectly. Thanks in advance. Thuong