Command-line errors and warnings
The articles in this section provide a reference to the command-line errors and warnings generated by the build tools. These messages have the form Dxxxx, where xxxx is a four-digit number.
Important
The Visual Studio compilers and build tools can report many kinds of errors and warnings. After an error or warning is found, the build tools may make assumptions about code intent and attempt to continue, so that more issues can be reported at the same time. If the tools make the wrong assumption, later errors or warnings may not apply to your project. When you correct issues in your project, always start with the first error or warning that's reported, and rebuild often. One fix may make many subsequent errors go away.
To get help on a particular diagnostic message in Visual Studio, select it in the Output window and press the F1 key. Visual Studio opens the documentation page for that error, if one exists. You can also use the search tool at the top of the page to find articles about specific errors or warnings. Or, browse the list of errors and warnings by tool and type in the table of contents on this page.
Note
Not every Visual Studio error or warning is documented. In many cases, the diagnostic message provides all of the information that's available. If you landed on this page when you used F1 and you think the error or warning message needs additional explanation, let us know. You can use the feedback buttons on this page to raise a documentation issue on GitHub. If you think the error or warning is wrong, or you've found another problem with the toolset, report a product issue on the Developer Community site. You can also send feedback and enter bugs within the IDE. In Visual Studio, go to the menu bar and choose Help > Send Feedback > Report a Problem, or submit a suggestion by using Help > Send Feedback > Send a Suggestion. Some compiler error topics were created that are not emitted by the compiler and now redirect to this page instead.
You may find additional assistance for errors and warnings in Microsoft Learn Q&A forums. Or, search for the error or warning number on the Visual Studio C++ Developer Community site. You can also search Stack Overflow to find solutions.
For links to additional help and community resources, see Visual C++ Help and Community.
Command-line error messages
Command-Line Error D8016
Command-Line Error D8021
Command-Line Error D8022
Command-Line Error D8027
Command-Line Error D8036
Command-Line Error D8037
Command-Line Error D8045
Command-Line Error D8048
Command-Line Error D8049
Command-line warning messages
Command-Line Warning D9024
Command-Line Warning D9025
Command-Line Warning D9026
Command-Line Warning D9027
Command-Line Warning D9028
Command-Line Warning D9035
Command-Line Warning D9036
Command-Line Warning D9040
Command-Line Warning D9041
Command-Line Warning D9043