How To Fix MCW_AA128 - The OLTP field name of a variable field can only have & characters

MCW_AA128 - Overview

• Message type: E = Error

• Message class: MCW_AA - Messages for BW Interface Analytical Applications

• Message number: 128

• Message text: The OLTP field name of a variable field can only have & characters

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message MCW_AA128 - The OLTP field name of a variable field can only have & characters ?

  The SAP error message MCW_AA128 indicates that there is an issue with the naming convention of a variable field in the context of OLTP (Online Transaction Processing) data. Specifically, the error states that the OLTP field name of a variable field can only contain the "&" character.
  
  Cause:
  This error typically arises when:
  
  The field name defined for a variable in a query or report does not adhere to the naming conventions expected by SAP.
  The field name may contain invalid characters or does not follow the required format, which is restricted to the "&" character.
  
  
  Solution:
  To resolve the error, you can take the following steps:
  
  
  Check Field Name: Review the field name that is causing the error. Ensure that it only contains valid characters, specifically the "&" character, and does not include any other special characters or spaces.
  
  
  Modify the Variable Field:
  
  If you are using a custom variable, go to the relevant configuration or definition area