welding line segments

You don't want to weld line segments together. The way to join them is first select and "combine" them and then use your shape tool to join the nodes.

(Edit) Sorry, I just read Mikes's comment more carefully and realized that I repeated what he already had said...

You can try setting the "Enable Node Tracking" Option ON. It will track the nodes even if you are using a pick tool. Not the exact result as you expect but a workaround.

Tools > Options > Workspace > Display --------- "Enable Node Tracking"

Just to make sure everyone is on the same page here, I am using corelcad not coreldraw. As far as I knew the only options I had to combine individual line segments was to use the weld, or edit polyline function. an example of my problem is this. If i make a rectangle and fillet the corners i can then extrude the entity and i have a nice plate with filleted edges. Now, lets say i have 4 circles setup in a square pattern and I want to connect them using 4 single line segments and then i trim the circles to give me a box with rounded corners. I am left with 8 individual segments. 4 lines and 4, 1/4 circles that form the box. If I extrude these 8 segments I end up with an extruded border and not an extruded plate because the segments are not joined into one. Is there a reason why I cant join these together? obviously I wouldnt build an extruded box using the later of the two methods but it is the simplest way to explain the scenario.