Windows 7 Known Issues: Workarounds When Installing or Running ANSYS Applications

Below is a listing of some of the issues we have seen with ANSYS applications running on Windows 7:
Problem - ANSYS Installs to C:UsersusernameAnsys_Inc instead of C:Program FilesANSYS Inc

Problem Description:

When installing ANSYS 12 on Windows 7, the program installs in C:Usersusername instead of Program Files.


Uninstall ANSYS, turn off UAC and reinstall to C:Program Files

Turning User Account Control on or off:
User Account Control (UAC) can help you prevent unauthorized changes to your computer. It works by prompting you for permission when a task requires administrative rights, such as installing software or changing settings that affect other users.

1.Open User Accounts by clicking the Start button, clicking Control Panel , clicking User Accounts and Family Safety (or clicking User Accounts, if you are connected to a network domain), and then clicking User Accounts.

2.Click Turn User Account Control on or off. If you are prompted for an administrator password or confirmation, type the password or provide confirmation.
Disable IPv6:

IPv6 is the latest address protocol that will eventually replace IPv4. From Windows Vista onward it has been kept enabled by default, but it is also a fact that IPv6 is not yet common, and much software, routers, modems, and other network equipment do not support it yet; including ANSYS. We recommend that you disable this protocol.

Please choose the link below from Microsoft's Web Site with Step by Step Instructions:

Article ID: 929852 - Last Review: June 29, 2010 - Revision: 5.0.

How to disable certain Internet Protocol version 6 (IPv6) components in Windows Vista, Windows 7 and Windows Server 2008:

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Error - You cannot install on Vista RTM. You must install Service Pack to proceed."

Problem Description:

You receive this error when trying to install ANSYS applications: "Error - You cannot install on Vista RTM. You must install Service Pack to proceed."


Right click on the executable and choose "Run as Administrator" before installing
Error - ANSYSLI_LOCAL_PORT Error in Workbench

Problem Description:

When launching Workbench you receive an error: No Servers found in ANSYSLI_LOCAL_PORT or similar


Uninstall ANSYS products. Reinstall by right-clicking on the setup.exe and choose "Run as Administrator".
Problem - ANSYS Mechanical APDL slow solving when machine is locked

Problem Description: ANSYS Mechanical APDL-Solve run slows down on Windows 7 when the machine is locked.

Resolution: By default the Windows 7 Power Management is set to "Balanced". Changing the power settings to "High Performance" should resolve this issue. The Balanced setting slows the disk down and enables options like hibernation.

Changing Power Management Options:

Go to Control Panel > All Control Panel Items > Power Options > check High Performance.
Problem - Graphics Issues

Windows 7 requires that you have a certified and updated graphics driver installed for this OS.
Once you have your video card and driver information go to the Video Card vendor`s
website and download a newer driver.

Choose one of the links for your video card vendor`s website:

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Remove the existing driver:

1.Open up Control Panel
2.Programs and Features
3.Uninstall NVIDIA or ATI Drivers
5.Install the newer downloaded driver
6.Reboot again

NOTE: It is very important that you follow these steps exactly, especially removing the existing driver in Step 3.
Problem - FLUENT Graphics Behavior

Problem Description:

The FLUENT GUI opens up but you cannot choose any menu options. The FLUENT TUI works fine. You might see this error: FLUENT error: "The FLUENT application failed to start".


Update your video card driver by following the directions above.

1.Running mixed Windows XP and Windows 7 machines, HP-MPI will have issues. Users are recommended to use Intel-MPI for this situation.

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