How To Fix 5P023 - Only the characters < = > are allowed

SAP Error Message - Details

• Message type: E = Error

• Message class: 5P - Error Messages for Schema, Pers.Calc.Rule and Feature Checks

• Message number: 023

• Message text: Only the characters < = > are allowed

What causes this issue?

You have used incorrect characters in the operation or variable key.

How to fix this error?

Read the related documentation and correct your entry.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message 5P023 - Only the characters < = > are allowed ?

  The SAP error message 5P023: "Only the characters < = > are allowed" typically occurs when there is an issue with the input data in a selection screen or a field that expects a specific format. This error is often related to the use of comparison operators in fields where only certain characters are permitted.
  Cause:
  
  Invalid Characters: The error is triggered when the input contains characters other than the allowed comparison operators (<, =, >). This can happen if a user mistakenly enters invalid characters or if there is a formatting issue in the data being processed.
  Field Type Mismatch: The field may be expecting a numeric or date value, but the input does not conform to the expected format.
  Custom Code or Enhancements: If there are custom programs or enhancements in the system, they might not be handling input validation correctly.
  
  Solution:
  
  Check Input Values: Ensure that the input values in the selection screen or relevant fields only contain the allowed characters (<, =, >). Remove any invalid characters.
  Field Validation: Review the field definitions and ensure that the data types and expected formats are correctly defined. If the field is meant to accept only certain operators, ensure that the user is aware of this limitation.
  Debugging Custom Code: If the error arises from custom code, review the logic to ensure that it properly validates user input before processing it.
  User Training: Provide training or documentation to users to help them understand the correct input formats and the limitations of the fields they are working with.
  
  Related Information:
  
  SAP Notes: Check SAP Notes for any known issues or patches related to this error message. Sometimes, SAP releases updates that address specific error messages or bugs.
  Transaction Codes: If this error occurs in a specific transaction, it may be helpful to look at the transaction's documentation or help files for guidance on valid input formats.
  Community Forums: SAP Community and other forums can be valuable resources for finding similar issues faced by other users and the solutions they implemented.
  
  If the problem persists after checking the above points, it may be necessary to involve your SAP support team or consult with SAP directly for further assistance.