"Description of the R6025 run-time error in Visual C++"

SUMMARY

This article discusses an issue that may occur when you are developing a program.

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SYMPTOMS

The C++ program fails and reports the following run-time error:
runtime error R6025
- pure virtual function call

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CAUSE

This error occurs when your application indirectly calls a pure virtual member function in a context where a call to the function is not valid. In most cases, the compiler detects this and reports the error when building the application. But depending on how your code is written, sometimes the problem is detected only at run-time.

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RESOLUTION

Calling a pure virtual function is a programming error, so you need to find the call to the pure virtual function and rewrite the code so it is not called.

STATUS

This behavior is by design.

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