Ansys 19.1 – Fluent doesn’t start

- April 1, 2020 at 8:40 pm
  
  SimoneCarusotti
  Subscriber
  
  Hi,
  
  when I try to start Fluent 19.1 this starts but after a few seconds of loading the screen it stops and does not respond. After about a minute this closes and the message appears: The FLUENT application failed to validate the connection.
  
  Only a warning appears on the console: No chached password or password provided.
  
  I try to update windows (i have the last version of Windows 10), i try to reinstall Ansys and i try to deactivate the firewall but none of this worked.
  
  Help me please!
- April 2, 2020 at 2:24 pm
  
  Rob
  Forum Moderator
  
  Are you on the University network? The cached password tends to be for parallel, try serial.
- April 2, 2020 at 3:10 pm
  
  SimoneCarusotti
  Subscriber
  
  I am connected to the university network via VPN,
  
  The same error appears to me both in parallel and in serial, but I noticed that even when starting in serial configuration at the top it appears as if it were started in parallel.
  
  The console is very fast, but I noticed that the warning no longer appears in serial.
  
  Fluent, however, continues not to respond and to close after a few minutes.
- April 6, 2020 at 11:37 pm
  
  tsiriaks
  Ansys Employee
  
  Try starting with 'Parallel' and 0 processes.
  
  The issue is likely from VPN, there is a trick in newer versions of Fluent (2019 R1 and newer) when encountering this issue with MPI. In Fluent Launcher, select Show More Options -> Parallel Settings -> MPI Type: msmpi , Select IP Interface 127.0.0.1
- April 7, 2020 at 7:03 am
  
  SimoneCarusotti
  Subscriber
  
  Hi, thanks for the reply.
  
  I set Parallel and 0 processes and in more option i set what you indicate, but Fluent still does'nt respond and freezs on this screen:
  
  After a few minutes it close and this message appears: The FLUENT application failed to validate the connection.
- April 8, 2020 at 9:52 am
  
  SimoneCarusotti
  Subscriber
  
  I find the error: Fluent automatically opened on my second screen connected to my laptop and stopped; by chance I started it on the main screen (that of the laptop) and now it no longer freezes.
  
  I have no idea what the reason is.
- April 10, 2020 at 11:00 pm
  
  tsiriaks
  Ansys Employee
  
  Thank you for sharing your resolution.
  
  This means your machine setup has different graphics on the 2 monitors. The issue with freezing is with the graphics used on the other screen and not your laptop's.
  
  You can check dxdiag and see what graphics are used for Display 1 and Display 2.