How To Fix CM_SUB_DATA028 - Assign external caller &1 only once

SAP Error Message - Details

• Message type: E = Error

• Message class: CM_SUB_DATA - Substance Data (Header, ID, Reference, Materials)

• Message number: 028

• Message text: Assign external caller &1 only once

What causes this issue?

You attempted to assign the external caller &v1&. It is already
assigned to a query.

System Response

INCLUDE EHS_NA_STOP OBJECT DOKU ID TX

How to fix this error?

Assign the external caller only once.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message CM_SUB_DATA028 - Assign external caller &1 only once ?

  The SAP error message CM_SUB_DATA028 ("Assign external caller &1 only once") typically occurs in the context of SAP's Customer Management (CM) or similar modules where external callers or entities are being assigned to certain processes or objects. This error indicates that the system has detected an attempt to assign the same external caller more than once, which is not allowed.
  Cause:
  
  Duplicate Assignment: The primary cause of this error is that the external caller (identified by &1) is already assigned to a particular object or process, and there is an attempt to assign it again.
  Data Integrity Rules: SAP enforces data integrity rules to prevent duplicate entries that could lead to inconsistencies in the system.
  
  Solution:
  To resolve this error, you can take the following steps:
  
  
  Check Existing Assignments:
  
  Review the current assignments of the external caller in the relevant transaction or object. Ensure that the caller is not already assigned.
  Use transaction codes like SE16 or SE11 to check the relevant database tables for existing entries.
  
  
  
  Remove Duplicate Assignment:
  
  If you find that the external caller is already assigned, you may need to remove the duplicate assignment before attempting to assign it again.
  This can usually be done through the relevant transaction or by using a custom program if necessary.
  
  
  
  Modify the Process:
  
  If your business process requires multiple assignments of the same external caller, consider modifying the process to accommodate this requirement, possibly by creating a new instance or record for the caller.
  
  
  
  Consult Documentation:
  
  Review SAP documentation or help files related to the specific module you are working with to understand the rules governing external caller assignments.
  
  
  
  Contact SAP Support:
  
  If the issue persists and you cannot identify the cause, consider reaching out to SAP support for further assistance. They may provide insights specific to your system configuration.
  
  
  
  Related Information:
  
  Transaction Codes: Familiarize yourself with relevant transaction codes that may help in troubleshooting, such as SE16 (Data Browser), SE11 (Data Dictionary), or specific transaction codes related to the module you are working with.
  SAP Notes: Check for any SAP Notes related to this error message. SAP frequently releases notes that address known issues and provide solutions or workarounds.
  User Forums: Engage with SAP community forums or user groups where similar issues may have been discussed. Other users may have encountered the same error and can share their solutions.
  
  By following these steps, you should be able to identify the cause of the error and implement a solution to resolve it.