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Unable to use Sketch.RelationManager.[I]AddRelation in C# / COM app

Question asked by Vladas Sidlauskas on Oct 31, 2014



I want to add a coincident relationship between SketchPoint mySketchPoint and SketchLine mySketchLine using Sketch.RelationManager.[I]AddRelation in C# / COM app (SW2013 SP3)

I tried:


object []Objects = new object[2];


Objects[0] = mySketchPoint;

Objects[1] = mySketchLine;


int RelationNo = (int)swConstraintType_e.swConstraintType_COINCIDENT;


Sketch mySketch = (Sketch)this.SWModel.SketchManager.ActiveSketch;


mySketch.RelationManager.AddRelation(Objects , RelationNo);

// gives 'System.Runtime.InteropServices.COMException'


mySketch.RelationManager.IAddRelation(2, ref Objects , RelationNo);

// gives 'System.InvalidCastException'


AddRelation argumens are (object Entities, int RelationType)

IAddRelation arguments are (int NumEntities, ref object EntityArray, int RelationType)


Any hint is very welcome.



Vladas S.