Message type: E = Error
Message class:  RSO_BOIS - BW Repository: Integration of BOBJ Information Steward 
Message number: 104
Message text: RFC destination &1: connection not possible
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 RSO_BOIS104 indicates that there is an issue with the RFC (Remote Function Call) destination specified in the error message. The message typically states that the connection to the specified RFC destination is not possible. This can occur for various reasons, and here are some common causes, solutions, and related information: Causes: Network Issues: There may be network connectivity problems between the SAP system and the target system defined in the RFC destination. Incorrect RFC Destination Configuration: The RFC destination may be incorrectly configured, including wrong parameters such as the target host, system number, or client. Authorization Issues: The user credentials used for the RFC connection may not have the necessary authorizations to connect to the target system. Target System Down: The target SAP system may be down or not reachable due to maintenance or other issues. Firewall Restrictions: Firewalls or security settings may be blocking the connection to the target system. SAP Gateway
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