Message type: E = Error
Message class:  RSO_RES_QMSGS - Messages directly related to Query Designer. 
Message number: 054
Message text: External access: &1 &2 &3 &4
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.
To make things easier, more detailed information is frequently added to describe the issue, how to fix it, and the necessary steps or configuration modifications.
Unfortunately, there isn't any extra information in this error notice.
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The SAP error message RSO_RES_QMSGS054 typically indicates an issue related to external access permissions for a specific resource or object in the SAP system. The message format usually includes placeholders (&1, &2, &3, &4) that provide additional context about the specific resource or the nature of the access issue.
Cause: Authorization Issues: The user or process attempting to access the resource does not have the necessary authorizations. Resource Not Available: The resource being accessed may not be available or may not exist.
Configuration Issues: There may be misconfigurations in the system that prevent proper access to the resource. Network Issues: If the resource is external, there may be network connectivity issues preventing access.
Solution: Check Authorizations: Verify that the user or service account has the necessary authorizations to access the resource. This can be done by checking the roles and authorizations assigned to the user in transaction SU01 or PFCG. Ensure that the relevant authorization objects are included in
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