API BreakCurve method creates a new Duct/Pipe without MEPSystem

[jlpgy]

Hi developers:

There is a method named as BreakCurve in both

MechanicalUtils

 and

PlumbingUtils

It'a an easy approach of breaking a Duct or Pipe.

But, when I was debugging the following simple codes:

                    newElemId = MechanicalUtils.BreakCurve(
                           elem.Document, elem.Id, point);
                    var newDuct = elem.Document.GetElement(newElemId) as Duct;

I found out that the newDuct . MEPSystem property is "null".

This is little bit annoying.

Why does it happen?

In my opinion,if we break an exsiting duct, we break a big connection network into two smaller connection network, which means: at least the new duct after breaking should still share the same SYSTEM TYPE.

Is there any work around? For example, manually set a system type to the new duct or pipe?

And if you have read here, you can also refer to my former post in this forum:

trouble-of-my-own-implementation-of-breakcurve-on-conduit