How To Fix EQ400 - ====== messages 400 - 499 reserved for dis-/reconnection ================

SAP Error Message - Details

• Message type: E = Error

• Message class: EQ - Cross-IS-U functions

• Message number: 400

• Message text: ====== messages 400 - 499 reserved for dis-/reconnection ================

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?

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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 EQ400 - ====== messages 400 - 499 reserved for dis-/reconnection ================ ?

  The SAP error message EQ400, which falls within the range of messages 400 - 499 reserved for disconnection and reconnection issues, typically indicates a problem related to the connection between the SAP system and the underlying database or application server. This error can occur in various contexts, such as during data processing, report generation, or when accessing certain transactions.
  Cause:
  
  Network Issues: Temporary network disruptions can lead to disconnections between the SAP application server and the database.
  Database Locking: If the database is locked or busy, it may not be able to process requests, leading to disconnection errors.
  Timeout Settings: If the connection times out due to inactivity or long-running processes, this error may be triggered.
  Resource Limitations: Insufficient resources (CPU, memory, etc.) on the application server or database server can cause disconnections.
  Configuration Issues: Incorrect configuration settings in the SAP system or database can lead to connection problems.
  
  Solution:
  
  Check Network Connectivity: Ensure that there are no network issues between the SAP application server and the database. You can use tools like ping or traceroute to diagnose connectivity.
  Review Database Locks: Check for any locks on the database that may be preventing connections. You may need to unlock or terminate long-running transactions.
  Adjust Timeout Settings: Review and adjust the timeout settings in the SAP system and database configuration to allow for longer processing times if necessary.
  Monitor Resource Usage: Use monitoring tools to check the resource usage on both the application server and database server. If resources are low, consider scaling up or optimizing the system.
  Check SAP Notes: Look for relevant SAP Notes that may address this specific error or provide patches and updates that could resolve the issue.
  Restart Services: If the issue persists, consider restarting the SAP application server or the database server to reset connections.
  
  Related Information:
  
  SAP Support: If the issue continues after trying the above solutions, consider reaching out to SAP Support for further assistance. They may provide specific guidance based on your system configuration and logs.
  System Logs: Check the system logs (transaction SM21) for any additional error messages or warnings that could provide more context about the disconnection.
  Transaction Codes: Familiarize yourself with relevant transaction codes such as SM37 (Job Monitoring), SM50 (Process Overview), and ST22 (Dump Analysis) to diagnose and troubleshoot the issue further.
  
  By following these steps, you should be able to identify and resolve the underlying cause of the EQ400 error in your SAP system.