I am creating thermal zones for a building using the DD Wizard. I created floors 1 and 2 without any issues. While zoning the third floor, I noticed the model has begun to return errors saying "EL3 East Perim Plnm (G.E53) was referenced on line 31158 but never defined." I am pretty new to eQuest, but have noticed that when I input zones in the wizard, the program sequentially numbers each space (ex. for 40 spaces, numbered 1-40) and then sequentially numbers the corresponding plenums (ex. for 40 spaces, numbered 41-80). Since these errors have appeared, I noticed that eQuest is not necessarily generating a space for every new thermal zone. For instance, this floor has 40 thermal zones, but only 35 spaces were created. When I view results in Detail Edit, if I click on a thermal zone and only a plenum shows (as opposed to a plenum and a space). So the (35) spaces are numbered 1-35 and the 40 plenums are numbered 36-75, and I think the way the plenums are referenced in the .inp file is being effected by the error in numbering. Has anyone experienced this before? I assume I can fix the issue manually in Detail Edit when I am finished zoning, but would like to know where the issue is rooted so I won't be at a total loss if this happens again.