Learning Forum

[as4934]

Hi all,

I am trying to run a Fluid Structure Interaction simulation (2 way - Using Fluent, Transient Structural and System Coupling) and when the simulation gets to around 750 timesteps (time step of 5e-5 seconds) I get this error "(DP 0) There is no active application. Update failed for the Solution component in System Coupling.  The coupled update for system Transient Structural threw an exception. Unable to update solution. Either the application crashed or Workbench lost communication with it.". Any insight what might cause this and what I can do to rectify it would be very appreciated. Thank you in advance.

[Rahul]

Hello Abhishek,

When running System Coupling and it stops running, the first thing to do is examine the output files for each solver to look for clues to what happened. For Fluent, look at the transcript .trn file. For Mechanical, look at the .out file. For CFX, look at the .out file. Also, look at the System Coupling log file, scl. You can also try re-running the case and stopping it just before the timestep when it crashes, then examine the mesh in Fluent or CFD-Post to get more clues.

From error messages in your case, it looks like it is failing in transient structural system. Please check the .out file to understand the source of error.