How To Fix RO026 - Enter reference category and number or data of involved object

SAP Error Message - Details

• Message type: E = Error

• Message class: RO - Messages for (R)eferences between (O)bject numbers

• Message number: 026

• Message text: Enter reference category and number or data of involved object

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.

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Smart SAP Assistant

• What is the cause and solution for SAP error message RO026 - Enter reference category and number or data of involved object ?

  The SAP error message RO026, which states "Enter reference category and number or data of involved object," typically occurs in the context of SAP's Controlling (CO) module, particularly when dealing with internal orders, cost centers, or other controlling objects. This error indicates that the system requires specific reference information that has not been provided.
  Cause:
  The error can arise due to several reasons:
  
  Missing Reference Data: The user has not entered the required reference category and number for the transaction being processed.
  Incorrect Configuration: The system may not be properly configured to handle the specific type of transaction or object being referenced.
  Data Entry Error: There may be a simple oversight in data entry, such as a typo or omission of required fields.
  
  Solution:
  To resolve the RO026 error, you can take the following steps:
  
  
  Check Input Fields: Ensure that you have filled in all required fields, particularly the reference category and number. These fields are often mandatory for the transaction to proceed.
  
  
  Review Configuration: If you are an administrator or have access to configuration settings, check the configuration for the relevant controlling objects (like internal orders or cost centers) to ensure they are set up correctly.
  
  
  Consult Documentation: Refer to SAP documentation or help resources for the specific transaction you are trying to execute. This can provide insights into what data is required.
  
  
  Use Valid References: Make sure that the reference category and number you are entering are valid and exist in the system. You can use transaction codes like KOB1 (for internal orders) or KSB1 (for cost centers) to verify existing entries.
  
  
  Contact Support: If the issue persists after checking the above points, consider reaching out to your SAP support team or consulting with an SAP expert who can provide more tailored assistance.
  
  
  Related Information:
  
  Transaction Codes: Familiarize yourself with relevant transaction codes in the CO module, such as KO01 (Create Internal Order), KO02 (Change Internal Order), and KSB1 (Display Cost Centers).
  SAP Notes: Check SAP Notes for any known issues or patches related to this error message. SAP Notes can provide fixes or workarounds for specific problems.
  User Roles and Authorizations: Ensure that the user has the necessary authorizations to access and modify the relevant objects in the CO module.
  
  By following these steps, you should be able to identify the cause of the RO026 error and implement a solution to resolve it.