How To Fix CN849 - The duration cannot be larger than the maximum duration

SAP Error Message - Details

• Message type: E = Error

• Message class: CN - Meldungen für Netzpläne

• Message number: 849

• Message text: The duration cannot be larger than the maximum duration

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message CN849 - The duration cannot be larger than the maximum duration ?

  The SAP error message CN849 ("The duration cannot be larger than the maximum duration") typically occurs in the context of project management or network planning within SAP, particularly when dealing with activities in a project or network that have defined durations and constraints.
  Cause:
  This error arises when you attempt to set a duration for an activity that exceeds the maximum allowable duration defined in the system. The maximum duration can be influenced by various factors, including:
  
  Project Settings: The project or network may have specific settings that limit the duration of activities.
  Activity Type: Certain activity types may have predefined maximum durations.
  Dependencies: The relationships and dependencies between activities may impose constraints on the duration.
  Configuration Settings: Custom configurations in the SAP system may impose limits on activity durations.
  
  Solution:
  To resolve the CN849 error, you can take the following steps:
  
  
  Check Maximum Duration Settings:
  
  Review the maximum duration settings for the project or network. This can usually be found in the project definition or network settings.
  Ensure that the duration you are trying to set does not exceed these limits.
  
  
  
  Adjust Activity Duration:
  
  Modify the duration of the activity to be within the allowable range. This may involve reducing the duration to fit within the maximum limit.
  
  
  
  Review Activity Type:
  
  Check if the activity type you are using has specific constraints on duration. If necessary, consider changing the activity type.
  
  
  
  Examine Dependencies:
  
  Look at the dependencies and relationships between activities. Ensure that the changes you are making do not violate any constraints imposed by these relationships.
  
  
  
  Consult Configuration:
  
  If you have access to system configuration, check if there are any custom settings that might be affecting the maximum duration. You may need to consult with your SAP administrator or technical team.
  
  
  
  Documentation and Help:
  
  Refer to SAP documentation or help resources for more detailed information on project management and network planning settings.
  
  
  
  Related Information:
  
  Transaction Codes: You may use transaction codes like CJ20N (Project Builder) or CN22 (Change Network) to access and modify project or network details.
  SAP Notes: Check SAP Notes for any known issues or patches related to this error message.
  User Roles: Ensure that you have the necessary permissions to make changes to project or network settings.
  
  If the issue persists after following these steps, it may be beneficial to consult with your SAP support team or a functional consultant who specializes in project management within SAP.