Taxon Exception when opening second model

[joeb]

Find two models that have a different number of groups.

Open the model with the smaller number of groups first.

Open the model with the larger number of groups cTaxonDataStructures.NumGroupTaxa?() throws an exception that is handled and asserts. If you click throw the asserts the model will load but I'm guessing it is messed up and is just waiting to explode...