I found the issues that Nadnerb and Ehren discovered. One was a missing portal region; the other was a typo in the script. I did a complete walking tour of the city through the central subdistrict of each district and never noticed any missing geometry.
To try it yourself, first clear out all LinkTest01 files from your Uru install. [Easy way: right-click on Uru folder and choose Search..., then enter LinkTest01, then select all the files it found and hit the delete key.]
Then download the prototype:
LinkTest01_subdistrict3.zip (21.14 MB)
Aloys: when you're ready for integrating this, here's the initial steps to take:
0. Make a backup of your Ahra Pahts city file (the one containing the city link points).
1. Download this zipped Python file and unzip it into your blender/scripts directory:
[Yep - it is a newer version of the file I previously gave you, except it has a new wizard.]
2. Download this zipped Blender file and unzip it in the same directory as Ahra Pahts:
3. In your Ahra Pahts Blender file, change the page_num property of the city linking points to 0
4. Choose File->Append or Link, then open the lpcCol.blend file and select the only object inside: lpcCol. This will place the object in layer 12.
5. Make layer 12 visible and the layer containing the city linking points visible, then choose Scripts->Wizards->Pahts Wizards->Add collider under city link points. This will place a duplicate of the collider object 3 Blender units under each linking point.
6. Save your city file.
The next step would be for me to update my scripts to match all the page names in your Ahra Pahts file. Save your book text object to a file and email it to me; I'll then send you two PRP files (for Prin and static) and a new PAK file (containing the modified Pahts scripts). At that point, you can add the "hide: true" to all your pages and try out the paging mechanism.