After the Done from building and loading the udf's, it immediately shows the above error of 999999.nAt the end there is also the followingn==============================================================================nNode 0:Process 8824:Received signal SIGSEGV.n==============================================================================nMPI Application rank 0 exited before MPI_Finalize() with status 2nThe fl process could not be started.nAlso, if fixing in=out is not a good idea, then is there any other better way to assign the outlet from one surface to inlet of another?nCurrently calculating Area averaged massflux and pressure, and assigning F_PROFILE at new inlet = that area averaged value.n