How To Fix MG129 - Transaction &: special character for "blank field" is >&<

SAP Error Message - Details

• Message type: E = Error

• Message class: MG - Batch input: material master

• Message number: 129

• Message text: Transaction &: special character for "blank field" is >&<

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 MG129 - Transaction &: special character for "blank field" is >&< ?

  The SAP error message MG129 typically indicates that there is an issue with the input data in a transaction related to material management or inventory management. The specific message "special character for 'blank field' is >&<" suggests that the system is expecting a certain format or value, and the presence of special characters is causing a validation error.
  Cause:
  
  Invalid Input: The error often arises when a user inputs special characters (like &, <, or >) in a field that is expected to be blank or contain valid data.
  Field Restrictions: Certain fields in SAP have restrictions on the type of characters that can be entered. Special characters may not be allowed in specific fields.
  Data Formatting: The data being processed may not conform to the expected format, leading to this error.
  
  Solution:
  
  Check Input Fields: Review the fields in the transaction where the error occurred. Ensure that no special characters are present in fields that should be blank or contain only valid characters.
  Remove Special Characters: If you find any special characters in the input, remove them and try processing the transaction again.
  Consult Documentation: Refer to SAP documentation or help files for the specific transaction to understand the expected input formats and restrictions.
  Validation Rules: If you have access to the configuration settings, check if there are any validation rules that might be causing this error and adjust them if necessary.
  Contact Support: If the issue persists, consider reaching out to your SAP support team or consulting with an SAP expert for further assistance.
  
  Related Information:
  
  Transaction Codes: The error may occur in various transaction codes related to material management, such as MIGO (Goods Movement), MB1A (Goods Withdrawal), or others.
  SAP Notes: Check SAP Notes for any known issues or patches related to this error message.
  User Training: Ensure that users are trained on the correct data entry practices to minimize the occurrence of such errors.
  
  By following these steps, you should be able to resolve the MG129 error and successfully complete your transaction in SAP.