How To Fix CB018 - Defined maximum number of messages reached. Note long text.

SAP Error Message - Details

• Message type: E = Error

• Message class: CB - PP-PI-PMA: Dialog Messages for Process Management

• Message number: 018

• Message text: Defined maximum number of messages reached. Note long text.

What causes this issue?

More than &V1& messages exist for the selection criteria you have
entered. The maximum number entered for the messages to be selected
results in only &V1& messages being selected.
&V2& messages for process order &V3& were contained in theses &V1&
messages selected. More messages may, however, exist for this order but
have not been selected.

System Response

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

How to fix this error?

Go back to the initial screen of the message monitor.
Make one of the following changes:
Enter further selection criteria to restrict the number of messages
selected to < &V1&.
Increase the maximum number of messages to be selected.
If you do so, bear in mind that this decreases system performance.
INCLUDE PI_PM_MON_MAXANZ OBJECT DOKU ID TX LANGUAGE EN

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message CB018 - Defined maximum number of messages reached. Note long text. ?

  The SAP error message CB018, which states "Defined maximum number of messages reached," typically occurs in the context of SAP's message handling system, particularly when dealing with the Communication Management System (CMS) or similar messaging functionalities. This error indicates that the system has reached the predefined limit for the number of messages that can be processed or stored at a given time.
  Cause:
  
  Message Limit Reached: The system has a configuration that limits the number of messages that can be queued or processed. When this limit is reached, new messages cannot be added until some of the existing messages are processed or deleted.
  Configuration Settings: The maximum number of messages is often defined in the system settings, and it may not be sufficient for the current workload.
  Message Processing Delays: If messages are not being processed in a timely manner, they can accumulate and reach the limit.
  
  Solution:
  
  
  Increase Message Limit: 
  
  You can increase the maximum number of messages allowed in the system configuration. This is typically done in the relevant configuration settings for the messaging system (e.g., transaction codes like SPRO for configuration).
  Look for parameters related to message handling or communication settings and adjust the limits accordingly.
  
  
  
  Process Existing Messages: 
  
  Check the queue for existing messages and ensure that they are being processed. If there are messages that are stuck or not being processed, investigate the cause and resolve any issues.
  You can use transaction codes like SMQ1 (for outbound queues) or SMQ2 (for inbound queues) to monitor and manage message queues.
  
  
  
  Delete Unnecessary Messages: 
  
  If there are old or unnecessary messages in the queue, consider deleting them to free up space for new messages.
  
  
  
  Monitor System Performance: 
  
  Regularly monitor the performance of the messaging system to ensure that it is processing messages efficiently. This may involve checking for bottlenecks or issues in the processing logic.
  
  
  
  Consult Documentation: 
  
  Refer to SAP documentation or support notes for specific guidance related to your version of SAP and the messaging system you are using.
  
  
  
  Related Information:
  
  Transaction Codes: Familiarize yourself with relevant transaction codes for monitoring and managing message queues, such as SMQ1, SMQ2, SMD1, and SMD2.
  SAP Notes: Check SAP Notes for any known issues or patches related to message handling and the specific error message CB018.
  System Logs: Review system logs for any additional error messages or warnings that may provide more context about the issue.
  
  If the problem persists after trying the above solutions, it may be beneficial to reach out to SAP support for further assistance.