I have dicsovered this problem too. All pipes except one (with BORE 200) has centerlines.
All pipes made in paragon with common rule... I'm discomfitured.
The rulesetting in draft is ok but the Centerline must be set in Paragon as said by Sterentev.
Enter the paragon module and check the component->Reper-> Centerline
I too have same problem today, please let me know if you have any answer. Why centre lines for only few lines are missing. I do not understand the logic.