How To Fix CT781 - You cannot combine cost activities with external and/or int. processing

SAP Error Message - Details

• Message type: E = Error

• Message class: CT - CIM messages: ATAB table accesses

• Message number: 781

• Message text: You cannot combine cost activities with external and/or int. processing

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message CT781 - You cannot combine cost activities with external and/or int. processing ?

  The SAP error message CT781 indicates that there is an issue with the configuration of cost activities in a particular context, typically when trying to combine cost activities with external processing or internal processing in a way that is not allowed by the system.
  Cause:
  The error occurs when you attempt to assign cost activities to a process that is set up for external or internal processing, which is not permitted. This can happen in various scenarios, such as:
  
  Incorrect Configuration: The configuration of the cost activity or the related process may not allow for the combination of cost activities with external or internal processing.
  Master Data Issues: The master data for the cost activity or the related objects may not be set up correctly, leading to conflicts.
  Process Type Restrictions: Certain process types may have restrictions on how cost activities can be combined with other processing types.
  
  Solution:
  To resolve the CT781 error, you can take the following steps:
  
  
  Review Configuration: Check the configuration settings for the cost activities and the related processes. Ensure that they are set up correctly and that the combination you are trying to use is allowed.
  
  
  Check Master Data: Verify the master data for the cost activities and the processes involved. Ensure that all relevant fields are correctly populated and that there are no inconsistencies.
  
  
  Consult Documentation: Refer to SAP documentation or help resources for specific guidelines on the allowed combinations of cost activities and processing types.
  
  
  Adjust Process Type: If necessary, consider changing the process type to one that allows for the combination of cost activities, or adjust the cost activity settings to align with the processing type.
  
  
  Seek Help from SAP Support: If the issue persists, consider reaching out to SAP support for assistance. They can provide more detailed insights based on your specific configuration and usage.
  
  
  Related Information:
  
  Transaction Codes: Familiarize yourself with relevant transaction codes such as KP26 (Change Activity Type) or CJI3 (Project Actual Line Items) to analyze the cost activities and their configurations.
  SAP Notes: Check for any SAP Notes related to error CT781, as they may provide additional context or solutions.
  Community 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 root cause of the CT781 error and implement a suitable solution.