We recommend using Visual Studio 2017



The new home for Visual Studio documentation is Visual Studio 2017 Documentation on docs.microsoft.com.

The latest version of this topic can be found at [.ERRIDN]](https://docs.microsoft.com/cpp/assembler/masm/dot-erridn).

Generates an error if the text items are identical.

.ERRIDN[[I]] <textitem1>, <textitem2> [[, message]]  

If I is given, the comparison is case insensitive.

Directives Reference