How To Fix AD638 - Error in active POOL/CLUSTER

AD638 - Overview

• Message type: E = Error

• Message class: AD - Data Dictionary application messages

• Message number: 638

• Message text: Error in active POOL/CLUSTER

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.

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Smart SAP Assistant

• What is the cause and solution for SAP error message AD638 - Error in active POOL/CLUSTER ?

  The SAP error message AD638, which indicates "Error in active POOL/CLUSTER," typically arises in the context of database connections or when dealing with pooled or clustered resources in SAP systems. This error can occur due to various reasons, including issues with the database connection, configuration problems, or resource availability.
  Causes of AD638 Error
  
  
  Database Connection Issues: The error may occur if there are problems with the database connection, such as network issues, database server downtime, or incorrect connection parameters.
  
  
  Resource Limitations: If the system is running out of resources (e.g., memory, CPU), it may not be able to handle requests properly, leading to this error.
  
  
  Configuration Errors: Incorrect configuration settings in the SAP system or the database can lead to issues with resource pooling or clustering.
  
  
  Database Locking: If there are locks on the database that prevent access to certain resources, this can trigger the error.
  
  
  Version Compatibility: Incompatibility between the SAP application and the database