How To Fix E7042 - Assignment of an internal key is not permissible

E7042 - Overview

• Message type: E = Error

• Message class: E7 - IS-U master data

• Message number: 042

• Message text: Assignment of an internal key is not permissible

What causes this issue?

You have attemted to create a connection object or a device location
without assigning an external key, although this is not permitted.

System Response

The transaction was terminated.

How to fix this error?

Specify a key during creation of a connection object or device
location.

Procedure for System Administrators

Table <DS:SIMG._ISUBD_000002>TE130</> may not be correctly maintained.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message E7042 - Assignment of an internal key is not permissible ?

  The SAP error message E7042, "Assignment of an internal key is not permissible," typically occurs when there is an attempt to assign a value to a variable that is defined as an internal key in the context of ABAP programming. This error is often related to the use of internal tables, structures, or fields that are not allowed to be assigned directly.
  
  Cause:
  
  Internal Key Assignment: The error usually arises when you try to assign a value to a field that is defined as an internal key (e.g., a primary key in a database table or a unique identifier in an internal table).
  Data Type Mismatch: There may be a mismatch in data types between the source and target fields.
  Incorrect Use of Internal Tables: If you are trying to manipulate internal tables incorrectly, such as trying to assign a key field directly instead of using the appropriate methods.
  
  
  Solution:
  
  Check Data Types: Ensure that the