Microsoft C++ Runtime Library -

.symfix .reload !analyze -v Look for the module that called into the runtime (e.g., MyApp.exe calling msvcp140!std::string::assign ). Use ListDLLs (Sysinternals) or Process Explorer :

Get-ChildItem "HKLM:\SOFTWARE\Microsoft\VisualStudio\14.0\VC\Runtimes" | ForEach-Object Get-ItemProperty $_.PsPath Or for side-by-side: microsoft c++ runtime library

The phrase typically appears in a runtime error dialog on Windows. When you see this in a "deep content" context (e.g., a log file, crash dump, or error message), it indicates a problem with a program that depends on the Microsoft Visual C++ Redistributable . a log file

dir "%programfiles(x86)%\Microsoft Visual Studio\2019\*" If you provide the or a log snippet with the error, I can give a more targeted root cause analysis. or error message)