How To Fix RT664 - Number of users logged on - determined using CCMSPING

SAP Error Message - Details

• Message type: E = Error

• Message class: RT - Monitoring infrastructure MSG and alert texts

• Message number: 664

• Message text: Number of users logged on - determined using CCMSPING

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 RT664 - Number of users logged on - determined using CCMSPING ?

  The SAP error message RT664 indicates that there is an issue related to the number of users logged on to the SAP system, which is determined using the CCMSPING (CCMS Monitoring) tool. This message typically arises in the context of system monitoring and performance management.
  Cause:
  The error message RT664 can be triggered by several factors, including:
  
  
  Exceeding User Limits: The number of users logged into the SAP system may have exceeded the configured limit. This can happen if there are too many concurrent sessions or if the system is not properly configured to handle the expected load.
  
  
  System Performance Issues: If the system is experiencing performance issues, it may not be able to accurately report the number of logged-in users.
  
  
  Configuration Issues: There may be misconfigurations in the system settings related to user sessions or monitoring parameters.
  
  
  Network Issues: Connectivity problems between the monitoring tool and the SAP system can lead to inaccurate reporting of user sessions.
  
  
  Solution:
  To resolve the RT664 error, consider the following steps:
  
  
  Check User Sessions: Use transaction code SM04 or AL08 to check the number of active user sessions. If the number of users exceeds the limit, you may need to log off inactive users or increase the user limit in the system configuration.
  
  
  Review System Configuration: Ensure that the system parameters related to user sessions are correctly configured. This includes checking the profile parameters such as rdisp/max_user and rdisp/num_abap.
  
  
  Monitor System Performance: Use the CCMS monitoring tools to check for any performance bottlenecks. If the system is slow, it may not be able to handle the number of users effectively.
  
  
  Check Network Connectivity: Ensure that there are no network issues affecting the communication between the monitoring tool and the SAP system.
  
  
  Restart Monitoring Tools: Sometimes, simply restarting the CCMS monitoring tools can resolve temporary glitches.
  
  
  Consult SAP Notes: Check the SAP Support Portal for any relevant SAP Notes that may address this specific error message or provide additional troubleshooting steps.
  
  
  Related Information:
  
  CCMS (Computing Center Management System): This is a monitoring tool in SAP that helps administrators monitor system performance, user sessions, and other critical metrics.
  Transaction Codes: Familiarize yourself with transaction codes like SM04 (User Overview) and AL08 (Global User Overview) for monitoring user sessions.
  SAP Documentation: Refer to the official SAP documentation for detailed information on user management and system monitoring.
  
  If the issue persists after following these steps, it may be beneficial to engage SAP support for further assistance.