D3dx9_31.dll Error Messages

I am receiving D3dx9_31.dll error messages saying -

"D3DX9_31.DLL Not Found"

sometimes,
"D3dx9_31.dll not found. Reinstalling might help fix this."

what is the reason ? does anyone know.........help

All d3dx9_31.dll issues are caused in one way or another by a single issue - a problem with Microsoft DirectX.

The d3dx9_31.dll file is one of many files contained in the DirectX software collection. Since DirectX is utilized by most Windows based games and other advanced graphics programs, d3dx9_31.dll errors usually show up only when using these programs.

Upgrading to the latest version of DirectX 9 will fix the d3dx9_31.dll not found error.
Microsoft often releases updates to DirectX 9 without updating the version number or letter so be sure to install the latest release even if your version is technically the same.

If the latest DirectX version from Microsoft doesn't fix the d3dx9_31.dll error you're receiving, look for a DirectX installation program on your game or application CD or DVD. Usually, if a game or other program utilizes DirectX, the software developers will include a copy of DirectX on the installation disc.

Sometimes, though not often, the DirectX version included on the disc is a better fit for the program than the latest version available online.

Uninstall the game or software program and then reinstall it again. Something might have happened to the files in the program that work with d3dx9_31.dll and a reinstallation could do the trick.

Solution for this error

Restart your computer if you haven't already.

The d3dx9_31.dll error might be a one-time issue and a simple restart could clear it up completely. It's unlikely this will fix the problem, but restarting is always a good first step with nearly any problem.

Install the latest version of Microsoft DirectX 9. Chances are, upgrading to the latest version of DirectX 9 will fix the d3dx9_31.dll not found error.

Note: Microsoft often releases updates to DirectX 9 without updating the version number or letter so be sure to install the latest release even if your version is technically the same.

Note: Are you a Windows Vista user with DirectX 10? Your game or program may still need DirectX 9 files to run properly so give the installation a try. Don't worry, both versions of DirectX can be run side by side in Windows Vista.

Assuming the latest DirectX version from Microsoft doesn't fix the d3dx9_31.dll error you're receiving, look for a DirectX installation program on your game or application CD or DVD. Usually, if a game or other program utilizes DirectX, the software developers will include a copy of DirectX on the installation disc.

Sometimes, though not often, the DirectX version included on the disc is a better fit for the program than the latest version available online.

Uninstall the game or software program and then reinstall it again. Something might have happened to the files in the program that work with d3dx9_31.dll and a reinstallation could do the trick.

Restore the d3dx9_31.dll file from DirectX 9 software package. If the above steps haven't worked to resolve your d3dx9_31.dll error, try extracting the d3dx9_31.dll individually from the DirectX 9 software package.

you can also download ddl file from net and place it in windows folder.