In some datasets several nodes has the same set of coordinates. That is not allowed in RW Net data structure and is here referred to as 3D nodes (more nodes on top of each other).
If you for each link in your dataset has 2 fields with fromnode and tonode ID information, you can save the content of these 2 fields in a space-delimited text file and run this function together with your GIS street network.
The output will be a GIS point theme ("Node_3D"), which shows the position of these situations. Format is as defined in property GISformat.
The resulting file can be used in one of 3 ways:
1) To slightly (manually) modify the coordinates in the GIS street database, so the coordinates are not the same anymore.
2) As input to function TurnStandard. This requires that only 2 nodes at a time has the same set of coordinates.
3) Combine the links pairwise. This requires that any other attribute information (such as street name) is the same on both sides of the node.