The table summarizes part of the error conditions:

Target	Error Condition	Error Level	Comment
All kinds of artifacts	Class having 2 attributes with same name	Error	""
Entity	Entity inheriting from association class	Warning	Note that I think the import tool makes it already an association class artifact
Association Class	Association class inheriting from entity	Warning	""
Association (including AssociationClass)	For association and association classes, both ends are not navigable	Error	Tigerstripe is supposed to validate that, but often hidden by other errors
Enumeration	abstract enumeration	Error	all enumeration should not be abstract
attributes of any artifacts, parameters of any operations	Invalid default value for enum: any text not matching on of the enum	Error	""
attributes of any artifacts, parameters of any operations	Invalid default value for boolean: FALSE instead of false or NA; TRUE instead of true or NA.	Error	""
attributes/ends of any artifacts, parameters of any operations	Attributes with unknown datatype	Error	primitive.unknown is defined in TIP profile

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