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