How To Fix LAW2_MESSAGES166 - RFC changes were not saved

SAP Error Message - Details

• Message type: E = Error

• Message class: LAW2_MESSAGES - LAW 2.0 Message Class

• Message number: 166

• Message text: RFC changes were not saved

Self-Explanatory Message

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.

What else can you do?

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.

Smart SAP Assistant

• What is the cause and solution for SAP error message LAW2_MESSAGES166 - RFC changes were not saved ?

  The SAP error message LAW2_MESSAGES166, which states "RFC changes were not saved," typically occurs in the context of managing Remote Function Calls (RFC) in SAP systems. This error can arise during various operations, such as when trying to save changes to RFC destinations or when there are issues with the configuration of RFC connections.
  Causes:
  
  Authorization Issues: The user may not have the necessary authorizations to make changes to RFC destinations.
  Configuration Errors: There may be issues with the configuration of the RFC destination itself, such as incorrect parameters or missing information.
  System Lock: The system might be locked for changes due to ongoing processes or maintenance activities.
  Technical Issues: There could be underlying technical issues, such as database locks or connectivity problems.
  Transport Issues: If changes are being transported from one system to another, there may be issues with the transport request.
  
  Solutions:
  
  Check Authorizations: Ensure that the user has the necessary authorizations to modify RFC destinations. This can be done by checking the user's roles and authorizations in the SAP system.
  Review Configuration: Double-check the configuration of the RFC destination. Ensure that all required fields are filled out correctly and that the destination is properly defined.
  System Status: Check if the system is in a state that allows changes. If there are ongoing processes, wait for them to complete before attempting to save changes again.
  Check for Locks: Use transaction codes like SM12 to check for any locks that might be preventing changes from being saved. If locks are found, they may need to be released.
  Transport Request: If the changes are part of a transport request, ensure that the transport is correctly configured and that there are no issues with the transport system.
  System Logs: Review system logs (transaction SM21) for any additional error messages or warnings that might provide more context about the issue.
  
  Related Information:
  
  Transaction Codes: Familiarize yourself with relevant transaction codes such as:
  
  SM59: For managing RFC destinations.
  SM12: To check for locks.
  SM21: To view system logs.
  
  
  SAP Notes: Check the SAP Support Portal for any relevant SAP Notes that might address this specific error or provide additional troubleshooting steps.
  Documentation: Review SAP documentation related to RFC configuration and management for best practices and guidelines.
  
  If the issue persists after trying the above solutions, it may be beneficial to consult with your SAP Basis team or reach out to SAP support for further assistance.