How To Fix EL491 - You can only enter an operator or the delta character "&"

EL491 - Overview

• Message type: E = Error

• Message class: EL - IS-U meter reading data processing

• Message number: 491

• Message text: You can only enter an operator or the delta character "&"

Self-Explanatory Message

Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of messages in the SAP system have a message text, however this is frequently insufficient to comprehend or resolve the problem.

To make things easier, more detailed information is frequently added to describe the issue, how to fix it, and the necessary steps or configuration modifications.

Unfortunately, there isn't any extra information in this error notice.

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Smart SAP Assistant

• What is the cause and solution for SAP error message EL491 - You can only enter an operator or the delta character "&" ?

  The SAP error message EL491, which states "You can only enter an operator or the delta character '&'," typically occurs in the context of using the SAP system for reporting or data selection, particularly when working with selection criteria in queries or reports.
  
  Cause:
  This error usually arises when the user attempts to enter an invalid character or expression in a field that expects a specific operator or the delta character (&). The delta character is often used in SAP to indicate a change or difference, particularly in contexts like data comparisons or delta processing.
  Common Scenarios:
  
  Invalid Input: The user may have entered an invalid character or string in a selection field where only operators (like =, <>, >, <, etc.) or the delta character are allowed.
  Incorrect Field Type: The field may be expecting a numeric or date value, and the user has entered a string or other unsupported format.
  Misconfiguration: There could be