Unlike many other DLL errors which can have complicated causes and fixes, d3dx9_30.dll issues are caused in one way or another by a single issue: there’s usually something wrong with Microsoft DirectX.
The d3dx9_30.dll file is one of many files contained in the DirectX software collection. Since DirectX is utilized by most Windows based games and advanced graphics programs, d3dx9_30.dll errors usually show up only when using these kinds of applications.
Any of Microsoft's operating systems since Windows 98 may be affected by d3dx9_30.dll and other DirectX issues. This includes Windows 11, Windows 10, Windows 8, etc.
There are quite a few different ways a d3dx9_30 DLL error might show up on your computer, such as:
- D3DX9_30.DLL Not Found
- File d3dx9_30.dll not found
- The dynamic link library d3dx9_30.dll could not be found in the specified path [PATH]
- The file d3dx9_30.dll is missing
- D3DX9_30.DLL is missing. Replace D3DX9_30.DLL and try again
- D3dx9_30.dll not found. Reinstalling might help fix this
- Missing component d3dx9_30.dll
- This application has failed to start because d3dx9_30.dll could not be found
The error could apply to any program that utilizes Microsoft DirectX, but it's most commonly seen with video games. The error typically appears when the software program is started. Occasionally, these errors will display after a game is loaded but right before gameplay begins.
Some common games that have been known to generate such errors include Medieval, Resident Evil, EverQuest, Splinter Cell Double Agent, ArmA: Armed Assault, World Series of Poker, Company of Heroes, and more.
In non-game applications, the error message might appear before certain advanced graphics features of the program are used.
How to Fix D3dx9_30.dll Errors
Follow these steps in the order they're given below to try the more likely fixes first.
Do not, under any circumstances, download d3dx9_30.dll from any “DLL download site”. There are a number of reasons why downloading DLLs like that is never a good idea. If you already have, remove it from wherever you put it and continue with the following steps.
Restart your computer if you haven’t yet done so.
The d3dx9_30 DLL error might be a fluke or 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 troubleshooting step.
Install the latest version of Microsoft DirectX. Chances are, upgrading to the latest version will fix the d3dx9_30.dll not found error.
Microsoft often releases updates to DirectX without updating the version number or letter, so be sure to install the latest release even if your version is technically the same.
Assuming the latest DirectX version from Microsoft doesn't fix the error you're receiving, look for a DirectX installation program on your game or application CD or DVD. Usually, if a game or another program utilizes DirectX, the software developers will include a copy of it on the installation disc.
Sometimes, though not often, the version included on the disc is a better fit for the program than the latest edition available online.
Uninstall the game or software program and then reinstall it again. Something may have happened to the files in the program that work with d3dx9_30.dll and a reinstallation could do the trick.
Restore the d3dx9_30.dll file from the latest DirectX package. If the above troubleshooting steps haven’t worked to solve your d3dx9_30.dll error, try extracting the file individually from the DirectX package.
If the DLL error in the game or other program explains where the d3dx9_30.dll file needs to be, you can manually copy it from your extraction and put it right where it should go, which should fix the error.
Update the drivers for your video card. While it’s not the most common solution, in some situations, updating the drivers for the video card in your computer could correct this DirectX issue.
Need More Help?
If you don’t want to fix this problem yourself, see How Do I Get My Computer Fixed? for a full list of your support options, plus help with everything along the way like figuring out repair costs, getting your files off, choosing a repair service, and a lot more.