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Safety Semantic Error: The FB instance '...' is used more than once.

The same function block instance is called more than once in the code, i.e., the instance name is used several times. Reading/writing the same instance data by more than one FB instance is not allowed.

Remedy:
  1. Double-click the error in the Error List to jump to the suspected variables table (where the second declaration is marked).
  2. Delete or rename the suspected instance.
    In case of renaming, you have to modify the related code accordingly.