C3D 2025 - Pressure Pipe ID not Matching Catalog ID

[Cadguru42]

Here's a new one. I've got a pressure catalog of PCCP pipes. The Diameter Inside (in) field is correct in the catalog. But in the parts list in C3D it shows the outer diameter value for the inner diameter value. What's going on?

This parts list is using that catalog, so why is the Inner Diameter value not the same as the catalog? This is messing with the label style that reads the inner diameter, which is how I noticed it.

EDIT: I checked another catalog (ductile iron) and it also has the same issue. Both catalogs were created from Infrastructure Parts Editor.

[Cadguru42]

So it turns out Autodesk has programed C3D to completely ignore the Diameter Inside parameter in the catalog. They use the Connection Points data to calculate the inner diameter. 

C3D uses the Connection Points>Outer Diameter minus the Wall Thickness in order to determine the Inner Diameter used by the parts lists and labeling system. IPE does not export the wall thickness data, so this was empty. Thus, the Inner Diameter was the same as the Outer Diameter since there was no data for the connection point wall thickness.

Autodesk needs to fix IPE to export the wall thickness correctly as well as change C3D to actually read the Diameter Inside parameter that's in the catalog for the inner diameter. Why is C3D using a calculation for the connection point data instead of the actual pipe data?