How To Fix C5818 - Process instruction number &/&/&/& is not unique

SAP Error Message - Details

• Message type: E = Error

• Message class: C5 - Master Recipe

• Message number: 818

• Message text: Process instruction number &/&/&/& is not unique

What causes this issue?

The process instruction numbers for phase &V3& of the recipe &V2& in the
recipe group &V1& are not unique. To process a recipe, the numbers of
the process instruction for a phase must be unique.

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

How to fix this error?

Please check the recipe and correct the numbers of the process
instructions for phase &V3&.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message C5818 - Process instruction number &/&/&/& is not unique ?

  The SAP error message C5818 indicates that there is a problem with the process instruction number in the context of production planning or process management. This error typically arises when the system encounters non-unique process instruction numbers, which are expected to be unique identifiers for specific process instructions in the system.
  Cause:
  
  Duplicate Process Instruction Numbers: The most common cause of this error is that there are multiple entries in the system with the same process instruction number. This can happen due to data entry errors, incorrect configuration, or issues during data migration.
  Incorrect Master Data: If the master data related to process instructions is not properly maintained, it can lead to conflicts and duplicates.
  Configuration Issues: Sometimes, the configuration settings in the SAP system may not be set up correctly, leading to the generation of non-unique identifiers.
  
  Solution:
  
  Identify Duplicates: Use transaction codes like SE16 or SE11 to access the relevant database tables (e.g., the process instruction table) and check for duplicate entries. You can run queries to find all instances of the process instruction number in question.
  Correct Data: Once duplicates are identified, you will need to correct the data. This may involve deleting or merging duplicate entries, or updating them to ensure that each process instruction number is unique.
  Review Master Data: Ensure that the master data related to process instructions is accurate and up-to-date. This includes checking for any inconsistencies in the data that could lead to duplicates.
  Check Configuration: Review the configuration settings in the SAP system to ensure that they are set up correctly to prevent the creation of duplicate process instruction numbers in the future.
  Consult Documentation: Refer to SAP documentation or help notes related to process instructions for any specific guidelines or best practices that may apply to your situation.
  
  Related Information:
  
  Transaction Codes: Familiarize yourself with relevant transaction codes such as C223 (Maintain Process Instructions) or C201 (Create Process Order) to manage process instructions effectively.
  SAP Notes: Check SAP Notes for any known issues or patches related to this error message. SAP Notes can provide additional insights or solutions that may not be covered in standard documentation.
  User Authorization: Ensure that you have the necessary authorizations to make changes to process instructions and master data in the SAP system.
  
  If the issue persists after following these steps, it may be beneficial to consult with your SAP support team or a technical consultant who can provide further assistance.