How To Fix KX721 - CPIC &: Communication link could not be created

SAP Error Message - Details

• Message type: E = Error

• Message class: KX - EC-EIS/EC-BP: Data basis, data collection

• Message number: 721

• Message text: CPIC &: Communication link could not be created

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.

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Smart SAP Assistant

• What is the cause and solution for SAP error message KX721 - CPIC &: Communication link could not be created ?

  The SAP error message KX721, which states "CPIC &: Communication link could not be created," typically indicates a problem with the communication between the SAP system and the database or another system. This error can arise from various issues, including network problems, configuration errors, or issues with the database itself.
  Causes:
  
  Network Issues: There may be a network connectivity problem between the SAP application server and the database server.
  Database Configuration: The database may not be configured correctly, or the database service may not be running.
  SAP Profile Parameters: Incorrect settings in the SAP profile parameters related to the database connection.
  Firewall Settings: Firewalls may be blocking the necessary ports for communication.
  Incorrect Connection Parameters: The connection parameters (like hostname, port, user credentials) may be incorrect.
  Resource Limitations: The database server may be overloaded or out of resources, preventing new connections.
  
  Solutions:
  
  
  Check Network Connectivity:
  
  Use tools like ping or telnet to check if the SAP server can reach the database server.
  Ensure that there are no network outages or issues.
  
  
  
  Verify Database Status:
  
  Ensure that the database service is running and accessible.
  Check the database logs for any errors or issues.
  
  
  
  Review Connection Parameters:
  
  Verify the connection parameters in the SAP system (transaction DBACOCKPIT or DB02).
  Ensure that the hostname, port, and credentials are correct.
  
  
  
  Check SAP Profile Parameters:
  
  Review the instance profile parameters related to the database connection (e.g., rdisp/TRACE, rdisp/HTTP/enable, etc.).
  Adjust any parameters that may be incorrectly set.
  
  
  
  Firewall Configuration:
  
  Ensure that the firewall settings allow traffic on the necessary ports for the database connection.
  Check both the SAP server and the database server for firewall rules.
  
  
  
  Monitor Resource Usage:
  
  Check the resource usage on the database server (CPU, memory, connections).
  If the server is overloaded, consider optimizing queries or increasing resources.
  
  
  
  Restart Services:
  
  Sometimes, simply restarting the SAP application server or the database server can resolve transient issues.
  
  
  
  Consult Documentation:
  
  Refer to SAP Notes and documentation for specific guidance related to your SAP version and database type.
  
  
  
  Related Information:
  
  SAP Notes: Search for relevant SAP Notes in the SAP Support Portal that may address this specific error.
  Transaction Codes: Use transaction codes like SM21 (System Log) and ST22 (Dump Analysis) to check for additional error messages or dumps that may provide more context.
  Database Logs: Review the logs of the database for any errors or warnings that could indicate the root cause of the communication failure.
  
  If the issue persists after trying the above solutions, it may be necessary to involve your SAP Basis team or database administrator for further investigation.