Import Routing connections in Eplan Pro panel

I am trying to import routing connections from Excel into a 3D Layout Space (no 2D schematics in this project). EPLAN recognizes the columns, but 90% of the lines fail with: "The source and/or target of the routing connection are not placed in layout space."

The setup (see attached images):

• Format: I am using the full DT with connection point designations (e.g., ). ==H26014007R=+PRM_J100-B1.1:1
• Placement: All components are definitely placed in the 3D Layout Space.
• Indices: I have "Internal" set in the Internal/External index columns.

My mapping (see image): I've mapped Source, Internal/external index:Source, Target,Internal/external index:Target, Connection Designation, Color, and Cross-section.

My questions:

1. Could the "Internal" string in the Index column be the problem? Should I leave it empty for 3D routing? (but without it the terminals break and don't wire properly)
2. Since there is no 2D, do I need to explicitly map a "Function definition" (like "Conductor / wire") for EPLAN to "see" the 3D connection points?
3. Is there a hidden project setting for 3D-only projects that enables external connection routing?

I'm using this for an AI data mining project, so I need to find a way to make this import 100% reliable. Any ideas?