[Jiricbeng]

I successfully did Oscilating plate tutorial (no 23).
Then I switched off the time integration in structural model and in CFX I set analysis type as steady state.
In structural, Time Step is 0.1s and Step End Time is 5s. in CFX Coupling Time Duration is set to 5s. If I set Coupling Time Steps to 0.5 to computation runs, it is okey. But if I change the Coupling Time Steps to 0.1 (or just another value than 0.5) the solver runs but suddenly fails during the computation -
ERROR #001100279 has occurred in subroutine ErrAction, Message: CFX encountered the error: Read. Fatal error occurred when requesting Total Mesh Displacement for interface").
I read the condition is
"The Coupling Time Duration and the Coupling Time Steps must be set so that the Coupling Time Duration is an exact multiple of Coupling Time Steps"
but I do not know why it works just in case the Coupling Time Steps is 0.5