Fix: Microsoft Visual C++ Runtime Error R6025

Runtime Error R6025 is an error associated with Microsoft’s Visual C++ development environment. Any application or program that has been developed using the Visual C++ studio is among the pool of possible targets for this error. Runtime Error R6025 has been seen affecting both off the shelf applications and programs that have been developed using Visual C++ (Steam games, for example) and applications users affected by this error personally developed using Visual C++. The entirety of the error message that is seen when you run into this error reads:

“Runtime Error R6025
-Pure Virtual Function Call”

According to one of Microsoft’s Knowledge Base articles pertaining to this specific issue, Runtime Error R6025 is triggered when a Visual C++ based application indirectly summons a pure virtual member function in a context where a call to that specific function is not even valid. If you run into this error while developing an application, you simply added an invalid call to a pure virtual function somewhere in the application’s code. If that is the case, your compiler might even detect the invalid call and report the error to you while building the application, but in many instances this specific error can only be detected when actually running a compiled application. If you run into this error while using an off the shelf program or application, however, the root of the problem might be entirely different.

In any case, the following are the most effective solutions that can be used to combat Runtime Error R6025:

Solution 1: Fix the application’s code

The simplest and most effective solution to this issue is simply sifting through the affected application’s code for the invalid call and removing it from the code. Obviously, however, this option is only viable if you’re running into Runtime Error R6025 on an application that you yourself developed. Here’s how you can rid your application’s code of the invalid call to a pure virtual function that’s making all this mess in the first place:

1. Within the affected application’s code, replace the pure virtual function being called upon with an implementation designed to call the Windows API function DebugBreak.
2. When DebugBreak is engaged, the use of the debugger will trigger a hard-coded breakpoint, at which point the code will stop running.
3. When the breakpoint is triggered and the code stops running, simply analyze the callstack to see exactly where in the application’s code the function was called, and then remove the call.

Try running the application now, and it should run without spewing out Runtime Error R6025.

Solution 2: Run an SFC scan

You might be seeing Runtime Error R6025 because of corrupted system files. If that is the case, the recommended course of action is to run an SFC scan. The System File Checker utility is designed to check Windows computers for system files that have been damaged or corrupted and either repair any that it finds or replace them with cached, completely intact versions. To run an SFC scan, simply follow this guide.

Solution 3: Install any missing Microsoft Visual C++ Redistributable packages

Another possible cause of Runtime Error R6025 is missing Microsoft Visual C++ Redistributable packages. Windows computers depend on a wide array of different Microsoft Visual C++ Redistributable packages in order to successfully and seamlessly run Visual C++ applications, and missing Redistributable packages can lead to a Windows computer having trouble running Visual C++ applications. Here’s how you can check for and install missing Microsoft Visual C++ Redistributable packages on your computer:

1. 1. Open the Start Menu.
   2. Search for “add or remove programs“.
   3. Click on the search result titled Add or remove programs.
   4. Wait for the list of programs installed on your computer to be populated.
   5. Within the list of programs installed on your computer, you will see a number of different Microsoft Visual C++ Redistributable packages. What you need to do is figure out if any packages are missing and not currently installed on your computer.
   6. You can download installers for any Redistributable packages missing from your computer from the following links or, if you need a different Redistributable package, from the Downloads section on Microsoft’s official website:
      Microsoft Visual C++ 2010 Redistributable Package (x86)
      Microsoft Visual C++ 2012 Redistributable Update 4
      Microsoft Visual C++ 2013 Redistributable Package
      Microsoft Visual C++ 2015 Redistributable Package

Solution 4: Repair or Uninstall and then reinstall Microsoft Visual C++

You might be running into Runtime Error R6025 because the iteration of Microsoft Visual C++ that you have on your computer has somehow been corrupted and is no longer functioning as it should. If that is the case, you are either going to have to repair your installation of Microsoft Visual C++, or uninstall and then reinstall it from scratch in the event that the repair doesn’t work. To do so, you can use the Microsoft Visual C++ installer that came with the application that’s affected by this problem in the first place. Most, if not all, Visual C++ applications come with an installer for Microsoft Visual C++. If you would like to use this solution, you need to:

1. Navigate to the directory on your computer where the installer for Microsoft Visual C++ is stored. For example, if you’re running into Runtime Error R6025 while playing Skyrim through Steam, the installer will be located in the following folder as vcredist_x86.exe:
   X:\…\Steam\SteamApps\Common\Skyrim\VCRedist
   Note: In the directory above X represents the letter corresponding to the partition of your hard drive the Steam directory is located in, and … represents whatever parent folders (if any) the Steam directory has.
2. Locate vcredist_x86.exe and double-click on it to run it.
3. When asked if you want to Repair the installation or Remove it, select Repair.
4. Go through the installer, wait for the repairs to be performed, and check to see if the problem has been resolved.

In the event that Runtime Error R6025 still persists, repeat steps 1 and 2 from above, and then:

1. When asked if you want to Repair the installation or Remove it, select Remove.
2. Go through the installer and wait for your installation of Microsoft Visual C++ to be removed.
3. Once Visual C++ has been uninstalled, run vcredist_x86.exe once again.
4. This time around, the installer will know that Microsoft Visual C++ is not even installed on your computer, so going through it will reinstall Visual C++.
5. Once Visual C++ has been reinstalled, check to see if the issue has been fixed.