How To Fix MD729 - Invalid transaction code or indicator for external system not set

MD729 - Overview

• Message type: E = Error

• Message class: MD - Material Requirements Planning (MRP)

• Message number: 729

• Message text: Invalid transaction code or indicator for external system not set

What causes this issue?

You have entered a transaction code that cannot be found.

System Response

The system does not accept the entry.

How to fix this error?

If you wish to execute the transaction in the local system, enter a
valid transaction code. If you wish to carry out the transaction in an
<ZK>SAP Advanced Planning and Optimization (SAP APO)</> system,
additionally set the <DS:DE.AEXTS>Transaction Call in an External System
</> indicator on the single screen.

Procedure for System Administrators

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

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message MD729 - Invalid transaction code or indicator for external system not set ?

  The SAP error message MD729, which states "Invalid transaction code or indicator for external system not set," typically occurs in the context of Material Requirements Planning (MRP) or when dealing with external systems in SAP. This error indicates that there is an issue with the configuration or setup of the transaction code or the integration with an external system.
  Causes:
  
  Incorrect Transaction Code: The transaction code being used may not be valid or recognized by the system.
  Missing Configuration: The integration settings for the external system may not be properly configured, leading to the system not recognizing the transaction code.
  Authorization Issues: The user may not have the necessary authorizations to execute the transaction.
  Data Inconsistencies: There may be inconsistencies in the data being processed, such as missing or incorrect entries in the relevant tables.
  System Settings: The settings for the external system may not be correctly defined in the SAP system.
  
  Solutions:
  
  Check Transaction Code: Verify that