How To Fix MC729 - Key field &-& missing. Specify maintenance status 'read only'.

SAP Error Message - Details

• Message type: E = Error

• Message class: MC - Aggregate: views, matchcodes, lock objects

• Message number: 729

• Message text: Key field &-& missing. Specify maintenance status 'read only'.

What causes this issue?

A key field of the base table was not included in a view which is not
marked as 'read only'. Views with which data is to be changed or
inserted must contain all the key fields of the base table.

System Response

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

How to fix this error?

Include the missing key fields in the view or set the maintenance
status to R (read only).

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message MC729 - Key field &-& missing. Specify maintenance status 'read only'. ?

  The SAP error message MC729, which states "Key field &-& missing. Specify maintenance status 'read only'," typically occurs in the context of Material Management (MM) or Production Planning (PP) modules when there is an issue with the data being processed in a transaction or report. This error indicates that a required key field is missing from the data being accessed or modified.
  Cause:
  
  Missing Key Fields: The error usually arises when a key field that is necessary for the operation (like a material number, plant, or storage location) is not provided or is empty.
  Read-Only Status: The system is in a read-only mode for the data being accessed, which means that changes cannot be made, and the required key fields must be present to proceed.
  Data Inconsistency: There may be inconsistencies in the data, such as missing entries in the database or issues with the configuration of the material master or related tables.
  
  Solution:
  
  Check Key Fields: Ensure that all required key fields are filled in the transaction or report you are trying to execute. This may involve checking the material master data or the specific transaction data.
  Review Maintenance Status: If the system is in a read-only state, check if the maintenance status of the data can be changed. This may require appropriate authorizations or adjustments in the configuration.
  Data Validation: Validate the data in the relevant tables to ensure that there are no missing entries. You can use transaction codes like SE11 (Data Dictionary) to check the structure of the tables involved.
  Consult Documentation: Refer to SAP documentation or help resources for specific details about the transaction or report you are working with, as they may provide insights into required fields and configurations.
  Contact Support: If the issue persists, consider reaching out to your SAP support team or consulting with SAP Notes for any known issues related to this error message.
  
  Related Information:
  
  Transaction Codes: Familiarize yourself with relevant transaction codes that may help in troubleshooting, such as:
  
  MM03: Display Material
  MM02: Change Material
  MC.9: Inventory Analysis
  
  
  SAP Notes: Search for SAP Notes related to error MC729 in the SAP Support Portal for any patches or updates that may address the issue.
  User Authorizations: Ensure that the user has the necessary authorizations to access and modify the data in question.
  
  By following these steps, you should be able to identify the cause of the error and implement a solution to resolve it.