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| #6087 | Run-time catchable error | ||||||||
Attempting to use an existing referent with no defined value in the current nested-referents scope.
 Additional Information
 For referent 'X'.
 where X is the name of the referent.
Explanation
This error occurs when a referent which has never been assigned a value gets directly or indirectly written to a stream that is resolved at the end of the referent scope.
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