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Error 1055: 'Ancestor' can only be used in the code of a class derived from a class
Reason
You are trying to use the 'Ancestor' keyword in the code of a non-derived class.

Reminder: The 'Ancestor' keyword is used to specify, in the code of a derived class, the ancestor class associated with the method or with the member to use.
Correction
Don't use the 'Ancestor' keyword.
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Last update: 05/26/2022

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