Fixing basic errors in meshes?

[lightpanther]

This basic problem showed up on a chair arm in a tutorial I am following, where two chamfers join. Despite following the steps exactly, the instructor's chair is fine, but mine did this spontaneously, creating the hole seen here. What is/are the basic ways of handling this sort of situation to repair the geometry without making it worse, such that problems don't arise later? I already tried some things, such as vertex welding, but this made things worse and I had to revert.

[Steve_Curley]

Insert 2 new vertices into that angled edge. Use Target Weld to weld each of those new vertices (individually) to the 2 existing vertices on the border of the hole. I'd be tempted to find another tutorial, because even at that stage you have lots of "T" junctions which ought to be continued on so you have proper edge loops. That sort of geometry will not smooth nicely at all (using TurboSmooth or the like) which you will probably need.

[lightpanther]

Hi. Just two quick questions about your suggestion so that I understand it. Which two vertices do you mean by on the border of the hole? (there are four). Am I using "refine" to add these extra vertices?

[Steve_Curley]

Assuming the object is an Editable Poly:-

Edge sub-object level, Insert Vertex (button at the top of the Edit Edges rollout). There are 4 vertices around the hole - the 2 which are opposite the edge which is at an angle, i.e. NOT the vertices at the end of that edge.