How To Fix /SAPAPO/AMON021 - New session could not be started

/SAPAPO/AMON021 - Overview

• Message type: E = Error

• Message class: /SAPAPO/AMON -

• Message number: 021

• Message text: New session could not be started

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 /SAPAPO/AMON021 - New session could not be started ?

  The SAP error message /SAPAPO/AMON021 New session could not be started typically occurs in the context of SAP Advanced Planning and Optimization (APO) when there is an issue with starting a new session for a specific transaction or process. This error can arise due to various reasons, and here are some common causes, potential solutions, and related information:
  Causes:
  
  Session Limit Exceeded: The user may have reached the maximum number of sessions allowed by the SAP system.
  System Configuration: The system may not be configured correctly to allow new sessions.
  User Lock: The user account may be locked or have restrictions that prevent starting new sessions.
  Resource Limitations: The SAP system may be experiencing resource limitations (e.g., memory, CPU) that prevent new sessions from being initiated.
  Network Issues: Connectivity problems between the client and the SAP server can also lead to this error.
  
  Solutions:
  
  
  Check Session Limit:
  
  Go to the SAP GUI and check how many sessions you currently