I have the same problem in pedia. It's missing pedia, just like when you don't point the correct KFM for a unit.
I made an other model from scratch, but it remained the same. I had a look at Merjin tutorial for building, it doesn't seem to be something wrong in the modelling process. I tried to find a mention of a similar problem here, but the search engine is such a mystery to me... I don't have five hours to spend in reading every thread with the word "building" or "error" appearing in it.
I'm thinking of incorrect Lsystem, but for now I haven't clearly understood how it works.
I'm sorry, I was glad giving you this model, but I don't understand what's going wrong. I'll try one more time to rebuild one before friday, if you haven't found anyone to help with this issue before.