Ansys Employee

Ok, thanks for checking in the new version as well. 

It sounds like the input file is missing some boundary condition information. The keyword REAC occurs for inlet streams to a reactor and is the mole fraction of the reagent gases entering the reactor for an inlet stream or for the initial conditions in a closed system. For example, REAC fuel1 C2H2 0.5, would indicate that acetylene has a mole fraction of 0.5 for an inlet stream named fuel1. The sum of all the reactant mole fractions for a stream should equal one.