The "msvcp140_codecvt_ids.dll" file is a Dynamic Link Library (DLL) associated with Microsoft's Visual C++ Redistributable for Visual Studio. This particular DLL file is generally used for character conversion, as the term "codecvt" suggests ("code conversion" for short). In simple terms, it's a part of the software libraries that help programs handle text and other data conversions. Applications built with Microsoft's Visual Studio may rely on this file for certain functionalities. The DLL is usually installed automatically when you install a program that needs it, or it might be included as part of the Microsoft Visual C++ Redistributable package. If the file is missing, you might encounter error messages when trying to run certain applications, typically suggesting that the program can't start because the DLL file is missing.

For the general user, encountering an error related to "msvcp140_codecvt_ids.dll" usually means that a piece of software on your computer requires this file to operate correctly but can't find it. The common fix is to install or reinstall the Microsoft Visual C++ Redistributable package, which should include this and other required DLL files.