To create context :
go to Tools –> Detect Loops, BO will detect loops if there are any & will suggest the
context candidate (something like Sales, Costs that is related to that specific subject
area) Select the suggested candidate & click on create Context. It will map all those joins that are required for say Sales subject area & put it in Sales Context. same with Costs. So it will avoid the conflicts in path by using Contexts.
This Auto Detection works in most of the times….but not always.