Room computations only succeeded without considering the following elements

Should you see this message, it would be after linking a Revit file into the host project.  The warning is as follows:

Room computations only succeeded without considering the following elements.

 

In the Revit 2011 release, room bounding elements are calculated internally through a linked file.  If there is a bounding element that cannot be calculated it will be excluded.  It is important to note that this is rare, and the user will be notified when the project is linked or reloaded into the host project.

The warning dialog box currently lists the element id of the Revit link, not the element id of the specific element being excluded inside the link.  It is important to note the linked file itself is not being excluded, instead only the specific element[s].

If you would like to capture the specific element id of the excluded element it is visible in the journal file. Open the current journal file located in “C:\Program Files\Autodesk\Revit version\Journals” and look for the following line:

TB- RegionMaker fails: Broken LoopSegment chain 
TB- Info on failing curve 2540: 
TB- Element id 1234567, ForeignElemRef 8888888

The element id in this example is 8888888.  The linked project could be opened directly and this element id could be isolated to see why it may be excluded from calculation.  The most common reason for exclusion is a very slight misalignment or off axis line.