How To Fix C4028 - +/- sign not allowed for value &

C4028 - Overview

• Message type: E = Error

• Message class: C4 - CTMS_SYNTAX_CHECK

• Message number: 028

• Message text: +/- sign not allowed for value &

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 C4028 - +/- sign not allowed for value & ?

  The SAP error message C4028, which states "± sign not allowed for value &," typically occurs when a user attempts to enter a value that includes a ± (plus-minus) sign in a field that does not accept it. This error is common in scenarios where numeric values are expected, such as in financial or quantity fields.
  
  Cause:
  
  Invalid Input: The most common cause is that the user has entered a value with a ± sign in a field that only accepts standard numeric values (e.g., integers or decimals).
  Data Format: The field may be configured to accept only specific formats, and the ± sign is not part of those formats.
  Copy-Paste Issues: Sometimes, copying and pasting data from other sources (like Excel or text documents) can inadvertently include special characters that are not visible.
  
  
  Solution:
  
  Remove the ± Sign: Check the value you are trying to enter and remove the ± sign. Enter the value as