Message type: E = Error
Message class:  CNVMBTRFC - Messages used in RFC Management and its objects 
Message number: 115
Message text: Synchronization for Destination &1 is not OK
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.
First, use our AnswerBot below to get a possible cause and solution (requires a premium subscription).
Also, review the in-depth Common Questions & Answers listed below; you could discover a solution there or be able to connect with others who have faced similar challenges.
You can also try searching the SAP support portal (support.sap.com) but you need a special user ID to access it. It is possible that an SAP support note exists that provides additional details about the mistake or even steps for fixing it.
The SAP error message CNVMBTRFC115 indicates that there is an issue with the synchronization of a destination in the context of a remote function call (RFC). This error typically arises during data migration or system conversion processes, particularly when using the SAP S/4HANA Migration Cockpit or similar tools.
Cause: The error message "Synchronization for Destination &1 is not OK" suggests that the system is unable to establish a proper connection to the specified RFC destination (denoted by &1). This can occur due to several reasons, including: Incorrect RFC Destination Configuration: The RFC destination may not be configured correctly in the SAP system. Network Issues: There may be network connectivity problems between the systems involved. Authorization Issues: The user credentials used for the RFC connection may not have the necessary authorizations. Service Not Running: The required services on the target system may not be running or may be misconfigured. System Availability: The target system may be down or
 Get instant SAP help. Sign up for our Free Essentials Plan.
Get instant SAP help. Sign up for our Free Essentials Plan. 
CNVMBTRFC114 Different host names (host '&1' ne host '&2')
Self-Explanatory Message Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of...
CNVMBTRFC113 Password not correct in local system (pwd not reentered)
Self-Explanatory Message Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of...
CNVMBTRFC116 For role &1 a destination is mandatory.
Self-Explanatory Message Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of...
CNVMBTRFC120 No destination state entry exist for destination id &1
Self-Explanatory Message Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of...
Click on this link to search all SAP messages.