How To Fix CN836 - Duration cannot be converted into desired unit

SAP Error Message - Details

• Message type: E = Error

• Message class: CN - Meldungen für Netzpläne

• Message number: 836

• Message text: Duration cannot be converted into desired unit

What causes this issue?

You have selected different units for work and duration when
calculating duration.
In this case, the calculated value for duration will be either too
small or too large to be displayed correctly. When the duration is too
small or less than 0.0, it will be displayed as 0. When the
duration is too large or greater than 9999.9, the system also
cannot display the correct duration.

System Response

INCLUDE 'NA_ALLG_NOFUNKTION' OBJECT DOKU ID TX

How to fix this error?

Select a different unit to display duration.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message CN836 - Duration cannot be converted into desired unit ?

  The SAP error message CN836 ("Duration cannot be converted into desired unit") typically occurs in the context of project management or when dealing with time-related data in SAP, particularly in the Project System (PS) module. This error indicates that there is an issue with the conversion of time durations between different units (e.g., days, hours, minutes).
  Causes:
  
  
  Inconsistent Time Units: The error may arise when there is an attempt to convert a duration that is not compatible with the desired unit. For example, trying to convert a duration expressed in days into hours without proper conversion factors.
  
  
  Incorrect Configuration: The system may not be configured correctly to handle the specific time units being used. This can happen if the project settings or the user settings are not aligned with the expected time formats.
  
  
  Data Entry Errors: Manual data entry errors, such as entering a duration in an incorrect format or using invalid characters, can lead to this error.
  
  
  Custom Development Issues: If there are custom programs or enhancements in place, they may not handle duration conversions correctly, leading to this error.
  
  
  Solutions:
  
  
  Check Duration Formats: Ensure that the duration is entered in the correct format and that the units are consistent. For example, if the system expects durations in hours, make sure that all entries are in hours.
  
  
  Review Project Settings: Check the project settings in the SAP system to ensure that the time units are configured correctly. This includes reviewing the settings for the project definition and the work breakdown structure (WBS).
  
  
  Validate Data Entries: Go through the data entries related to the project or task that is causing the error. Look for any inconsistencies or incorrect formats in the duration fields.
  
  
  Consult Documentation: Refer to SAP documentation or help resources for guidance on the specific transaction or process you are working with. This can provide insights into the expected formats and configurations.
  
  
  Debug Custom Code: If the error is occurring in a custom program, review the code to ensure that it correctly handles duration conversions. You may need to add error handling or validation logic to prevent this error from occurring.
  
  
  Contact SAP Support: If the issue persists and you cannot identify the cause, consider reaching out to SAP support for assistance. They can provide more specific guidance based on your system configuration and the context of the error.
  
  
  Related Information:
  
  SAP Notes: Check for any relevant SAP Notes that may address this specific error or provide patches or updates that could resolve the issue.
  Transaction Codes: Familiarize yourself with relevant transaction codes in the Project System module, such as CJ20N (Project Builder) or CJ02 (Change Project), where this error might occur.
  User Forums: Engage with SAP community forums or user groups where similar issues may have been discussed, and solutions shared.
  
  By following these steps, you should be able to identify the cause of the CN836 error and implement a suitable solution.