So, my understanding is that reservoir simulation software is very sticky, with a lot of renewals and not much switching. I'd like to hear your comments on that. When CMG or any reservoir simulation company loses a customer, why does that happen?

The drivers inside the oil companies, especially the bigger ones, tend to view reservoir simulation as part of the overall technical pie. In other words, it's not just about comparing simulator A to simulator B and making a decision. They ask, "What can we buy that will integrate into our IT-derived data workflow?"