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MSB3248 diagnostic code

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This article describes the MSB3248 error code.

Message text

MSB3248: Parameter 'parameter name' has invalid value 'value'.

Remarks

The error code MSB3248 occurs in the ResolveAssemblyReference task in MSBuild when there's an issue with the parameters specified for resolving assembly references. The ResolveAssemblyReference task is responsible for resolving assembly references in a project. You don't normally invoke this task directly; it's called during the .NET build process.

Common causes

The most likely cause is an MSBuild property setting that creates an issue with the assembly resolution process. See Common MSBuild properties.

Resolution

Look at what specific parameter triggers the error and its value and review how it's set or modified in your project files or imported files.

Enable detailed logging for your MSBuild process by using the /v:diag verbosity flag:

msbuild MyProject.proj /v:diag

This option provides a detailed log output, which should be helpful to determine which assembly reference is triggering the issue. Then, check the values of the properties that are related to that assembly, and the project that references it.

You can also create a binary log by using the -bl command-line option, and use MSBuild structured log viewer to more easily view the log output. For more information, see Troubleshoot assembly references.

Applies to

All versions of MSBuild