How To Fix GW633 - Maximum number of CPIC clients reached

SAP Error Message - Details

• Message type: E = Error

• Message class: GW - Message Texts for Gateway

• Message number: 633

• Message text: Maximum number of CPIC clients reached

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.

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Smart SAP Assistant

• What is the cause and solution for SAP error message GW633 - Maximum number of CPIC clients reached ?

  The SAP error message GW633 "Maximum number of CPIC clients reached" indicates that the maximum number of CPIC (Common Programming Interface for Communication) connections has been reached on the SAP system. This typically occurs when there are too many concurrent connections to the SAP system, which can happen due to various reasons such as high user activity, long-running transactions, or misconfigured settings.
  Causes:
  
  High User Load: A large number of users or processes trying to connect to the SAP system simultaneously.
  Long-Running Transactions: Transactions that take a long time to complete can hold onto CPIC connections longer than necessary.
  Configuration Limits: The system parameters for the maximum number of CPIC connections may be set too low.
  Resource Leaks: Applications or processes that do not properly close their connections can lead to exhaustion of available connections.
  Network Issues: Problems in the network can cause connections to hang, leading to a buildup of active connections.
  
  Solutions:
  
  
  Increase the Maximum Number of CPIC Connections:
  
  You can increase the limit of CPIC connections by adjusting the profile parameters in the SAP system. The relevant parameter is rdisp/max_comm_sessions.
  To change this parameter:
  
  Go to transaction RZ10.
  Select the appropriate instance profile.
  Add or modify the parameter rdisp/max_comm_sessions to a higher value.
  Save the changes and restart the instance for the changes to take effect.
  
  
  
  
  
  Monitor and Optimize User Activity:
  
  Use transaction SM50 or SM66 to monitor active processes and identify long-running transactions.
  Encourage users to log off when they are done to free up connections.
  
  
  
  Check for Resource Leaks:
  
  Review custom programs or third-party applications that connect to the SAP system to ensure they are properly managing their connections.
  
  
  
  Review Network Configuration:
  
  Ensure that there are no network issues causing connections to hang or fail.
  
  
  
  Implement Connection Pooling:
  
  If applicable, consider implementing connection pooling in your applications to reduce the number of concurrent connections to the SAP system.
  
  
  
  Related Information:
  
  SAP Notes: Check SAP Notes related to CPIC connections for any specific recommendations or patches.
  System Monitoring: Use tools like SAP Solution Manager or transaction ST03N to analyze system performance and user load.
  Documentation: Refer to the SAP Basis documentation for detailed information on system parameters and performance tuning.
  
  By addressing the underlying causes and implementing the suggested solutions, you should be able to resolve the GW633 error and improve the stability of your SAP system.