Fluent “Calculate” button is missing (images included)!!

- April 17, 2019 at 9:06 pm
  
  ansysuser
  Subscriber
  
  I was doing an FSI simulation and I got an error in the system coupling, as shown below:
  
  Now this is strange enough, because I had just finished a coupled run, cleared generated data, and added a single "Event" under "Dynamic Mesh" in Fluent that takes place at 0.5 seconds (the 25th substep). That is the only thing that I changed. So I opened Fluent to see what the problem was, and I thought I would initialize in Fluent and do a single time step to see if I could track down the source of the error. To my surprise, there is NO CALCULATE BUTTON showing up?! See the figure below:
  
  What is going on?? I can find no instance of this happening through goolge searches, and I tried already to save the project and close Workbench. When I re-open Workbench then Fluent, the same issue appears. I ran "Check Case" and got no results that indicate any problem.
  
  Help! Where is the Calculate button and what on earth does that error message mean??
- April 18, 2019 at 12:03 am
  
  ansysuser
  Subscriber
  
  Update: I solved this problem, but I will leave this here for reference to anyone else encountering the same issue in the future.
  
  If Fluent is part of a "System Coupling" then the Calculate button is missing. You cannot simply initialize and run a few time steps to check convergence without detaching the connections to the System Coupling block.
  
  Thanks
- February 5, 2020 at 7:47 pm
  
  Dilini
  Subscriber
  
  I got the same problem. It was missing so strangely. Thanks to you I would detach the connection and do it now. Thanks again for posting the result even though you found it yourself.
- May 24, 2023 at 4:41 pm
  
  lsingh
  Subscriber
  
  If you disconnect fluent from system coupling it will work.
  
  Thanks