The folowing table describes the parameters of the Error task.

The Error task allows MSBuild projects issue error text to loggers and stop build execution.

If the Condition parameter evaluates to true, the build is stopped, and an error is logged. If a Condition parameter does not exist, the error is logged and build execution stops. For more information on logging, see Overview of Logging in MSBuild.

The following code example verifies that all required properties are set. If they are not set, the project raises an error event, and logs the value of the Text parameter of the Error task.

<Project xmlns="http://schemas.microsoft.com/developer/msbuild/2003">
    <Target Name="ValidateCommandLine">
        <Error
            Text=" The 0 property must be set on the command line."
            Condition="'$(0)' == ''" />
        <Error
            Text="The FREEBUILD property must be set on the command line."
            Condition="'$(FREEBUILD)' == ''" />
    </Target>
    ...
</Project>

Concepts

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