Message
CommonStruct internal object has a missing mandatory relationship.
Severity
Fatal.
Detailed Description
A contour used to bound a slab is not related to any slab in the model.
Possible Cause
This cannot happen during normal operation. Improper use of SQL scripts is the only known workflow that has caused this problem.
Possible Impacts
Can prevent the deletion of related objects.
What You Should Do
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Open Project Management.
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Select the model in the tree view.
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Select Database > Integrity.
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Select the check box next to the Model database type, and then click Run.