How To Fix 5N851 - Invalid combination; see field documentation

SAP Error Message - Details

• Message type: E = Error

• Message class: 5N - HR NL: Error Messages for Infotype Module Pools (NL)

• Message number: 851

• Message text: Invalid combination; see field documentation

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.

What else can you do?

First, use our AnswerBot below to get a possible cause and solution (requires a premium subscription).

Also, review the in-depth Common Questions & Answers listed below; you could discover a solution there or be able to connect with others who have faced similar challenges.

You can also try searching the SAP support portal (support.sap.com) but you need a special user ID to access it. It is possible that an SAP support note exists that provides additional details about the mistake or even steps for fixing it.

Smart SAP Assistant

• What is the cause and solution for SAP error message 5N851 - Invalid combination; see field documentation ?

  The SAP error message 5N851 ("Invalid combination; see field documentation") typically occurs when there is an inconsistency or invalid combination of data entered in a transaction or during data entry in SAP. This error is often related to master data, configuration settings, or specific fields that do not align with the expected values defined in the system.
  Causes:
  
  Invalid Data Entry: The user may have entered a combination of values in fields that are not allowed or do not match the predefined rules in the system.
  Missing Master Data: Required master data (like materials, vendors, or customers) may not be set up correctly or may be missing.
  Configuration Issues: The system configuration may not support the combination of values being used. This could be due to settings in customizing or in the relevant modules (like MM, SD, etc.).
  Field Dependencies: Certain fields may have dependencies on others, and if those dependencies are not met, the error will occur.
  
  Solutions:
  
  Check Field Documentation: The error message suggests checking the field documentation. This can usually be done by hovering over the field or using the F1 help key in SAP to understand the valid values and combinations.
  Review Data Entry: Double-check the values entered in the fields to ensure they are valid and conform to the expected formats and combinations.
  Verify Master Data: Ensure that all necessary master data is created and correctly configured. For example, if you are working with materials, ensure that the material master is set up properly.
  Consult Configuration Settings: If you have access, review the configuration settings in the relevant module to ensure that the combinations of data you are trying to use are allowed.
  Seek Help from SAP Support: If the issue persists and you cannot identify the cause, consider reaching out to your SAP support team or consulting SAP Notes for any known issues related to this error.
  
  Related Information:
  
  Transaction Codes: Depending on where the error occurs, you may be using different transaction codes (e.g., ME21N for purchase orders, VA01 for sales orders, etc.).
  SAP Notes: Check SAP Notes for any specific fixes or updates related to this error message.
  User Roles and Authorizations: Ensure that the user has the necessary authorizations to perform the transaction, as sometimes restrictions can lead to unexpected errors.
  
  By following these steps, you should be able to identify and resolve the cause of the 5N851 error in SAP.