Message type: E = Error
Message class:  CNV_OM_PRESEL - Messages for LT Object Based Preselection 
Message number: 201
Message text: No authorization to view original table &1
Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of messages in the SAP system have a message text, however this is frequently insufficient to comprehend or resolve the problem.
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The SAP error message CNV_OM_PRESEL201 No authorization to view original table &1 typically indicates that the user does not have the necessary authorizations to access a specific database table in the SAP system. This error is often encountered during data migration or conversion processes, particularly when using tools like SAP's Data Migration Cockpit or other conversion tools.
Cause: Lack of Authorization: The user executing the transaction or program does not have the required authorization to view the specified table (denoted by &1 in the error message). Role Assignment: The user may not have been assigned the appropriate roles that include access to the required tables. Table-Specific Restrictions: Certain tables may have specific restrictions based on the organization's security policies.
Solution: Check User Authorizations: Use transaction SU53 immediately after encountering the error to check the authorization check failure. This will provide insights into which specific authorization object is missing. Review the authorization logs to identify the missing authorizations. Modify User
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