How To Fix ISLM_DI_GEN166 - Unknown error. CouldnÆt read the RFC destination details for &1.

SAP Error Message - Details

• Message type: E = Error

• Message class: ISLM_DI_GEN - DI Messages

• Message number: 166

• Message text: Unknown error. CouldnÆt read the RFC destination details for &1.

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 ISLM_DI_GEN166 - Unknown error. CouldnÆt read the RFC destination details for &1. ?

  The SAP error message ISLM_DI_GEN166, which states "Unknown error. Couldn't read the RFC destination details for &1," typically indicates an issue with the Remote Function Call (RFC) destination configuration in your SAP system. This error can arise due to various reasons, including misconfiguration, network issues, or authorization problems.
  Causes:
  
  RFC Destination Not Defined: The specified RFC destination (&1) may not be defined in the system.
  Incorrect Configuration: The RFC destination may be incorrectly configured, leading to issues in reading its details.
  Network Issues: There may be network connectivity problems preventing access to the RFC destination.
  Authorization Issues: The user or service account attempting to access the RFC destination may lack the necessary authorizations.
  System Errors: There could be underlying system errors or inconsistencies affecting the RFC infrastructure.
  
  Solutions:
  
  
  Check RFC Destination Configuration:
  
  Go to transaction code SM59 to check the configuration of the RFC destination.
  Ensure that the destination is defined and correctly configured (e.g., target host, system number, client, etc.).
  
  
  
  Test the RFC Connection:
  
  In transaction SM59, select the RFC destination and use the "Connection Test" option to verify if the connection is working properly.
  If the test fails, check the error messages for more details.
  
  
  
  Review Authorizations:
  
  Ensure that the user or service account has the necessary authorizations to access the RFC destination.
  Check roles and profiles assigned to the user.
  
  
  
  Check Network Connectivity:
  
  Verify that there are no network issues preventing access to the target system.
  Use tools like ping or telnet to check connectivity to the target host.
  
  
  
  Review System Logs:
  
  Check the system logs (transaction SM21) for any related error messages that might provide more context about the issue.
  
  
  
  Consult SAP Notes:
  
  Search for relevant SAP Notes in the SAP Support Portal that might address this specific error or provide additional troubleshooting steps.
  
  
  
  Restart Services:
  
  If the issue persists, consider restarting the relevant SAP services or the application server to clear any temporary issues.
  
  
  
  Related Information:
  
  
  Transaction Codes:
  
  SM59: RFC Destinations
  SM21: System Log
  ST22: Dump Analysis
  SICF: HTTP Service Hierarchy (for web services)
  
  
  
  SAP Documentation: Refer to the official SAP Help Portal for detailed documentation on RFC destinations and troubleshooting RFC-related issues.
  
  
  If the problem continues after trying the above solutions, it may be beneficial to engage with your SAP Basis team or SAP support for further assistance.