Fluent fails to open in 17.2 Version

- September 7, 2017 at 3:08 pm
  
  kh45
  Subscriber
  
  Hi
  
  I just recently installed Ansys 17.2 and can open workbench, DM, and Meshing, but for some reason I cannot open Fluent. The software either gets hung up, or I get an error saying cx1720.exe has stopped working. When I open error details, it says The FLUENT application failed to validate the connection. I followed the dl instructions on the site down to the letter so I am not sure what the problem is. Any ideas?
- September 8, 2017 at 12:20 am
  
  pgl
  Ansys Employee
  
  Which version of MS Windows are you using? Others have seen this problem with Windows 8.0.
- September 8, 2017 at 2:36 am
  
  kh45
  Subscriber
  
  I am using Windows 7 professional
- September 14, 2017 at 11:25 pm
  
  pgl
  Ansys Employee
  
  O.K. I found some mentions on the web that this issue was solved for some users by updating their Windows 7 installation, for example to the latest service pack. Others state that updating to Windows 10 was the best solution.
- September 22, 2017 at 8:05 pm
  
  kh45
  Subscriber
  
  This problem still hasnt been resolved for me. I recently learned how to download more error information. Maybe the error info below can help you diagnose the problem?
  
  Faulting application name: cx1720.exe, version: 0.0.0.0, time stamp: 0x5798d58c
  
  Faulting module name: atio6axx.dll, version: 6.14.10.12618, time stamp: 0x52a23eb1
  
  Exception code: 0xc0000005
  
  Fault offset: 0x0000000000052e6b
  
  Faulting process id: 0xdcc
  
  Faulting application start time: 0x01d333dc2bc2e4d4
  
  Faulting application path: C:PROGRA~1ANSYSI~1v172fluentfluent17.2.0cortexwin64cx1720.exe
  
  Faulting module path: C:Windowssystem32atio6axx.dll
  
  Report Id: 6a649604-9fcf-11e7-9121-0800270038fb
- March 23, 2019 at 5:15 pm
  
  koldasquare
  Subscriber
  
  Hi,
  
  I hade the same problem with Fluent of version 2019 R1 (19.3). I tried to:
  
  turn off the firewall,
  
  turn off antivirus program,
  
  changing user name on my computer,
  
  create a new account with a name not containg special characters and run Ansys there
  
  I also updated video drivers.
  
  (I could try to reinstall Ansys with deleting all remaining Ansys files before installing Ansys again, but I didn't believe that this would help for me so I didn't try it).
  
  Fluent still didn't work. Not even launched separatelly.
  
  Solution for me was updating Internet Explorer (from version 9 to 11). On one forum I read that a license information for the License Manager is sent via Internet Explorer so probably it is necessary to use the newest version of IE so Fluent can communicate with a license server properly.
  
  Hope this might help.
- September 25, 2020 at 3:12 pm
  
  Oscarcg
  Subscriber
  
  I have the same problem. Ansys Fluent failed to validate the connection. Does anyone know how to solve it? I have a student version.n
- September 25, 2020 at 7:22 pm
  
  tsiriaks
  Ansys Employee
  
  nLet's work on your issue from this threadn/forum/discussion/20638/problems-with-ansys-fluent-when-i-try-to-edit-setup-the-is-a-problem-the-folling-message-appears#latestn