How to fix the open edges?

#1 I don't use Max but if i understand what you mean you can either
select adjacent vertexes on one side of the edge to close, then merge them
select adjacent vertexes on the other side of the edge to close then merge

you may have the option to directly merge two edges together where they are not closed.

You should have a value you can change that tells max within what range (how far a part) two vertexes can be for the merge to act on them. If they are too far away they won't Merge


Edge 1: *A1_________*B1
Edge 2: *A2_________*B2

Select vertexes *A1 and *A2, then find your Merge Vertexes operator and apply it
Do the same for *B1 and *B2
Now there will be only one edge

There are other ways depending on your software, You can even select the whole bodymesh and as long as
1) all pair of vertexes are close enough to each other
2) your merge tolerance value is small enough to only operate on adjacent pair of vertexes
you can click on merge vertexes and all pair of vertexes will be merged, all edges will be closed.

Save your work before experimenting with new stuff.

#2 The "merge if vertices are close to each other" feature in max is called "Weld" and the "merge two vertices together no matter what" is called "Collapse". Look it up in the manual.

You can also build up new faces to cover the holes depending on the situation. Max8 have a nifty "bridge" feature, otherwise there's always the good old manual "Create" button when you have the Face sub-object selected.

#3 Thank you!!!! It works!!!!!!!!