SPS 2003 : "Cannot complete this action" Error message in custom list definition

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Problem:

While you create custom list instances on ONET.XML by adding to the configuration section, getting an error "Cannot complete this action" in the template selection screen

Resolution:

For the Custom List Definition, the DefaultDescription property is mandatory, so we should specify the DefaultDescription. But this property is not mandatory field for the DocumentLibrary, Announcements and other lists.

Example:

<List Title="CCH Employee" Url="Lists/EMPLOYEE" Type="222" DefaultDescription="Employee"/>