Microsoft has adopted the policy of making VC++ runtime dlls binary compatible between recent versions of Visual Studio.
As stated in
https://docs.microsoft.com/en-us/cpp/c-runtime-library/crt-library-features?view=vs-2019#c-standard-library
"For binary compatibility, more than one DLL file may be specified by a single import library. Version updates may introduce
dot libraries, separate DLLs that introduce new library functionality. For example, Visual Studio 2017 version 15.6 introduced msvcp140_1.dll to support additional standard library functionality without breaking the ABI supported by msvcp140.dll. The
msvcprt.lib import library included in the toolset for Visual Studio 2017 version 15.6 supports both DLLs, and the vcredist for this version installs both DLLs. Once shipped, a dot library has a fixed ABI, and will never have a dependency on a later dot library."
So,
1) You may be trying to run an application built using a debug configuration with VS2019 on a system that does not have VS2019 installed.
2) Debug versions are not redistributable. However, if you have VS2019 installed then the debug versions should be available in the location documented at
https://docs.microsoft.com/en-us/visualstudio/releases/2019/redistribution#-distributable-code-files-for-visual-studio-2019
Note that vcruntime140d.dll and vcruntime140_1d.dll are located in sub-folders of the debug_nonredist folder.
