How To Fix MI549 - Maximum number of main screens (&) exceeded

SAP Error Message - Details

• Message type: E = Error

• Message class: MI - Customizing for the Material Master

• Message number: 549

• Message text: Maximum number of main screens (&) exceeded

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 MI549 - Maximum number of main screens (&) exceeded ?

  The SAP error message MI549, which states "Maximum number of main screens (&) exceeded," typically occurs when the system has reached the limit of main screens that can be opened or displayed in a particular session. This can happen in various SAP transactions, especially when dealing with multiple sessions or screens.
  Cause:
  
  Exceeding Screen Limit: Each SAP session has a limit on the number of main screens that can be opened simultaneously. If you try to open more screens than the allowed limit, you will encounter this error.
  System Configuration: The maximum number of screens is determined by system configuration settings, which may vary based on the SAP version and system parameters.
  User Behavior: Users may inadvertently open too many sessions or screens, especially if they are navigating through multiple transactions without closing previous ones.
  
  Solution:
  
  Close Unused Screens: Review the open sessions and close any that are not needed. You can do this by navigating to the session and using the "Close" option or by using the transaction code /n followed by the transaction you want to open.
  Limit Session Usage: Be mindful of the number of sessions you open. Try to consolidate your work into fewer sessions to avoid hitting the limit.
  Check System Parameters: If you are consistently hitting this limit, it may be worth checking with your SAP Basis team to see if the maximum number of screens can be increased. This is controlled by the parameter rdisp/mshm_max_sess in the system profile.
  Log Off and Log Back In: Sometimes, simply logging off and logging back into the system can help reset the session limits.
  
  Related Information:
  
  SAP Notes: Check for any relevant SAP Notes that may provide additional insights or updates regarding this error message.
  Transaction Codes: Familiarize yourself with transaction codes that can help manage sessions, such as SM04 (User Overview) to see active sessions.
  User Training: If this error is common among users, consider providing training on best practices for managing SAP sessions and screens.
  
  If the problem persists after trying these solutions, it may be necessary to consult with your SAP support team for further investigation and assistance.