User is getting INTERNAL ERROR

Document ID : KB000074357
Last Modified Date : 20/03/2018
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Introduction:
Viewing a Secondary Index Data Base using File Master Plus for IMS
Question:
Why am I getting the error message of "INTERNAL ERROR", when trying to view a Secondary Index? 
Environment:
Running as a BMP
Answer:
We found out that the user doesn't have the required access to the database.