"binary was not built with debug information " warning meaning in mfc application?

It seems that your binary was build in Release mode

Now there are two ways which you can follow....

  • build the binary with "Debug" configuration
  • change the project settings so that a Program Database file (PDB) is generated in the release mode.

    Now you can generate PDB from the property window...

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If your project is already in Debug mode. Please check Advanced Build Settings Dialog Box in Build tab of project.

Make sure that Debug Info is not set to none enter image description here Reference:

Stackoverflow

MSDN


Another possible way you can see this error is if you're attempting to debug native code (C++) from managed code (C#) and the manage code's csproj is set to Native Only debugging. To fix it:

  1. Right click your csproj in VS and choose Properties
  2. On the Debug tab, set the Debugger type - Application process: to Mixed (Managed and Native)