How To Fix MAT_MESSAGES020 - Material number is mandatory, but empty

SAP Error Message - Details

• Message type: E = Error

• Message class: MAT_MESSAGES -

• Message number: 020

• Message text: Material number is mandatory, but empty

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.

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Smart SAP Assistant

• What is the cause and solution for SAP error message MAT_MESSAGES020 - Material number is mandatory, but empty ?

  The SAP error message MAT_MESSAGES020 indicates that a material number is required for the operation you are trying to perform, but the system has detected that the material number field is empty. This error typically occurs in various transactions related to material management, such as creating or updating material master records, processing inventory transactions, or executing purchase orders.
  Cause:
  
  Empty Material Number Field: The most straightforward cause is that the material number field has not been filled in the transaction you are attempting to execute.
  Incorrect Configuration: There may be configuration settings in the system that require a material number for certain processes, and these settings are not being met.
  User Input Error: The user may have overlooked entering the material number or may have mistakenly deleted it.
  Data Transfer Issues: If you are importing data or using an interface, the material number may not be included in the data being processed.
  
  Solution:
  
  Enter Material Number: Ensure that you enter a valid material number in the relevant field before executing the transaction.
  Check for Required Fields: Review the transaction screen to ensure that all mandatory fields, including the material number, are filled out correctly.
  Validate Data Entry: If you are using a data import or interface, check the source data to ensure that the material number is included and correctly formatted.
  Review Configuration: If the issue persists, consult with your SAP administrator or functional consultant to review the configuration settings related to material management to ensure they align with your business processes.
  Error Handling in Custom Programs: If this error occurs in a custom program or report, check the code to ensure that the material number is being correctly passed and validated.
  
  Related Information:
  
  Transaction Codes: This error can occur in various transaction codes such as MM01 (Create Material), MM02 (Change Material), MIGO (Goods Movement), and ME21N (Create Purchase Order).
  SAP Notes: Check SAP Notes for any known issues or patches related to this error message.
  Documentation: Refer to SAP Help documentation for detailed information on material management processes and required fields.
  User Training: Ensure that users are trained on the importance of entering mandatory fields in SAP transactions to avoid such errors.
  
  By addressing the empty material number field and ensuring that all required information is provided, you should be able to resolve the MAT_MESSAGES020 error.