How To Fix W8164 - A table element cannot be assigned a system field

W8164 - Overview

• Message type: E = Error

• Message class: W8 - Workflow: Expressions, data flow

• Message number: 164

• Message text: A table element cannot be assigned a system field

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message W8164 - A table element cannot be assigned a system field ?

  SAP Error Message:
  W8164 - A table element cannot be assigned a system field
  
  
  Cause:
  This warning occurs when you try to assign a system field (such as SY-... fields) directly to an element of an internal table in ABAP. System fields are special fields provided by the SAP runtime environment and are not designed to be stored in internal tables as table elements.
  For example, the following code would trigger this warning:
  DATA: itab TYPE TABLE OF sy-datum. " Invalid: sy-datum is a system field
  or
  DATA: itab TYPE TABLE OF some_structure.
  DATA: wa TYPE some_structure.
  
  wa-field = sy-datum.
  APPEND wa TO itab.
  If the structure contains a system field or you try to assign a system field directly to a table element, the system issues this warning.
  
  Explanation:
  
  System fields (SY- fields) are runtime fields that hold system information (like current date, time, user, etc.).
  They are not meant to be stored persistently or assigned directly to internal table elements.
  The ABAP runtime