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[Gmain <>]

sorry before I send an incomplete mail:

My question:
It happens sometimes, if the total number of halfedges to an existing vertex 
is
too big (f.i. 20>) the function:
join_face (h2); 
gets into an infinite loop. 

Maybe I have a mistake in implementation:
//this->H is halfedge of the edge to get deleted
Halfedge_handle h=this->H->next()->opposite();
Halfedge_handle h2=this->H->opposite()->prev()->opposite();
this->Intersectionmesh->myHDSdecorator_e.join_face (h);
this->Intersectionmesh->myHDSdecorator_e.join_face (h2);
this->Intersectionmesh->myHDSdecorator_e.join_vertex(H->opposite);

tx for your help
fanki