How To Fix M2786 - This combination of reference table and reference field is not allowed!

SAP Error Message - Details

• Message type: E = Error

• Message class: M2 - LIS: Generating and updating info structures

• Message number: 786

• Message text: This combination of reference table and reference field is not allowed!

What causes this issue?

The combination of reference table &V1& and reference field &V2& is not
permitted for the field &V3& in the communication structure &V4&.
You can only assign reference fields from the communication structure
&V4& to the fields of communication structure &V4&.
In addition, you can only assign unit fields of type UNIT to a quantity
field of type QUAN, and only unit fields of type CUKY to a currency
field of type CURR.

How to fix this error?

Specifiy a combination of reference table and reference field that is
permitted.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message M2786 - This combination of reference table and reference field is not allowed! ?

  The SAP error message M2786, which states "This combination of reference table and reference field is not allowed," typically occurs in the context of material management or inventory management when there is an issue with the configuration of material master data or when trying to create or modify a document that references a material.
  Cause:
  
  Incorrect Configuration: The error often arises when there is a mismatch between the reference table and the reference field in the material master or related configuration settings.
  Missing or Incorrect Data: The material master data may be incomplete or incorrectly set up, leading to inconsistencies in how the system expects to reference certain fields.
  Custom Development: If there are custom developments or enhancements in the system, they may not be correctly handling the reference fields, leading to this error.
  Authorization Issues: Sometimes, the user may not have the necessary authorizations to access or modify certain fields, which can trigger this error.
  
  Solution:
  
  Check Material Master Data: Review the material master data for the material in question. Ensure that all required fields are filled out correctly and that the reference fields are properly configured.
  Review Configuration Settings: Check the configuration settings in the SAP system related to material management. This includes checking the settings for the relevant reference tables and fields.
  Consult Documentation: Refer to SAP documentation or help resources to understand the specific requirements for the reference table and field combinations.
  Debugging: If you have access to debugging tools, you can trace the program or transaction that is causing the error to identify the exact point of failure.
  Check for Custom Code: If there are any custom developments, review the code to ensure that it is correctly handling the reference fields and tables.
  User Authorizations: Ensure that the user has the necessary authorizations to perform the action that is causing the error.
  
  Related Information:
  
  Transaction Codes: You may want to check transactions like MM01 (Create Material), MM02 (Change Material), or MM03 (Display Material) to see if the error occurs during these processes.
  SAP Notes: Search for relevant SAP Notes in the SAP Support Portal that may address this specific error or provide additional troubleshooting steps.
  Community Forums: Consider checking SAP Community forums or other user groups for similar issues and solutions shared by other users.
  
  If the issue persists after trying the above solutions, it may be beneficial to consult with your SAP support team or a technical consultant who can provide more in-depth assistance.