Weld command

Hi,

how the weld command works ?

 

I need to weld two lines but I can not do it.

 

When I select the Weld command in a command tool bar I can see:

  • Select base object --> I click on first line
  • Select welding segment --> I click on second line
  • The command tool bar shows: found 1, total 1

 

If I press ENTER nothing happen

 

I tried to search in help guide something about weld command but I don't found anything.