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Project item is not a Visual Basic 6.0 file

Visual Studio .NET 2003

The referenced item does not match any known Visual Basic 6.0 file format and cannot be upgraded. It may not be a Visual Basic 6.0 file, it may be from an older version of Visual Basic, or it may have the wrong file extension (for example, a .bas module with an .frm extension).

What to do next

Make sure that the project can be successfully compiled and run using Visual Basic 6.0 on the upgrade computer.

See Also

Preparing a Visual Basic 6.0 Application for Upgrading | Working with Both Visual Basic 6.0 and Visual Basic .NET