What does this message mean? for example, Link 1 is from Node 1 to Node 2 and Link 2 is from Node 2 to Node 3. Link 1 and Link 2 do share the common node of Node 2, but why I got this warning - Link 1 and Link 2 have coincident end points?
That just means that the pipes connect to the same pipe connection point location on the node. So if you were to cut a profile later you would only see a single line representing the node in profile. The program is just letting you know just in case you want the pipes to connect to a different pipe connect point location around the node.
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Thanks Beebe. How can I make a pipe connect to a different point around a node to get rid of this warning?
You would connect them to a different pipe connection point on the node. If you do not have pipe connection points then it uses the cell origin and you will not get rid of the message. The pipe connection points explained in the help in detail.
Thanks. If I have multiple pipe connection points (suppose a rectangular shape inlet having one connection point on each side), how do I let geopak drainage know which point I want a pipe to connect to?
One way to do it is - first you draw a line in Microstation that connects the nodes. This is just a graphical item and it doesn't have any hydraulic significance yet. Then you open the Geopak Drainage Navigator, toggle to the Links tab, and edit the appropriate Link ID. In the Link Config Definition window, check the box that says "Use MS Element". Then click on the "ID" button next to it, and go click on the graphical line that you drew in Microstation, and hit Apply.
This way, you've connected the pipes to the connection points of your choice on the nodes, and you've let Geopak Drainage know that these are your new links.