The reactor network model available in Fluent is used to simulate species and temperature fields in a combustor using a detailed chemical kinetic mechanism. In V19.0, while displaying contours of Reactor Network parameters such as reactor net zone ID or temperature, below error message pops up in Fluent console Error at Node 0: Different species order in mechanism vs Fluent case: re-import chemkin mechanism Error at host: Different species order in mechanism vs Fluent case: re-import chemkin mechanism Error: Different species order in mechanism vs Fluent case: re-import chemkin mechanism Error Object: #f Error: Invalid result name. Error Object: ()