Timestep reduced in # cells due to excessive pressure/temp change

[dkmenend]

Hello,

I am running a case with an explicit time step method. I am wondering what it means when i get the message "Timestep reduced in # cells due to excessive pressure/temp change"

How does fluent only reduce the timestep in some of the cells? Does it run multiple iterations on just those cells while the rest of the mesh is calculated once?

Thank you for your explanations. 

[Essence]

Hello,

Please check the mesh and case settings to avoid getting the message.