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In computing, a fatal exception error or fatal error is an error that causes a program to abort and may therefore return the user to the operating system. When this happens, data that the program was processing may be lost. A fatal error is usually distinguished from a fatal system errorcite-ref-1[1]cite-ref-2[2] (colloquially referred to in the MS Windows operating systems by the error message it produces as a "blue screen of death"). A fatal error occurs typically in any of the following cases:

• An illegal instruction has been attempted

• Invalid data or code has been accessed

• An operation is not allowed in the current ring or CPU mode

• A program attempts to divide by zero (only for integers; with the IEEE floating point standard, this creates an infinity instead).

In some systems, such as macOS and Microsoft Windows, a fatal error causes the operating system to create a log entry or to save an image (core dump) of the process.

• References

• External links

cite-note-11. ↑ "Fatal error". Webopedia. September 1996. Archived from the original on 2018-11-22. Retrieved 2010-10-31.

cite-note-22. ↑ "Stop error". Webopedia. 31 July 2003. Archived from the original on 23 July 2004. Retrieved 31 October 2010.

• What Are Fatal Exception Errors – Microsoft Knowledge Base