How To Fix MD_SUBSTN051 - Unable to determine the source based on object type 1

SAP Error Message - Details

• Message type: E = Error

• Message class: MD_SUBSTN - Messages for Master Data Substitution

• Message number: 051

• Message text: Unable to determine the source based on object type 1

What causes this issue?

The sources and rules are maintained by SAP.
For more information, contact technical support at SAP.

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?

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message MD_SUBSTN051 - Unable to determine the source based on object type 1 ?

  The SAP error message MD_SUBSTN051 ("Unable to determine the source based on object type 1") typically occurs in the context of Material Requirements Planning (MRP) or when dealing with the substitution of materials in SAP. This error indicates that the system is unable to find a valid source for a material based on the specified object type.
  Causes:
  
  Missing Source Data: The material may not have a valid source of supply defined in the system. This could be due to missing purchasing info records, source lists, or other relevant master data.
  Incorrect Object Type: The object type specified in the substitution process may not be correctly defined or may not correspond to any existing records in the system.
  Configuration Issues: There may be configuration issues in the MRP settings or in the material master data that prevent the system from determining the source.
  Data Inconsistencies: There could be inconsistencies in the data related to the material, such as incorrect status or missing entries in related tables.
  
  Solutions:
  
  Check Material Master Data: Ensure that the material in question has the necessary master data set up, including purchasing info records and source lists. You can do this by navigating to the material master (transaction code MM03) and checking the relevant views.
  Review Source Lists: If applicable, check the source list for the material (transaction code ME01) to ensure that valid sources are defined.
  Verify Object Type: Confirm that the object type being referenced in the substitution process is correct and corresponds to a valid entry in the system.
  Check MRP Configuration: Review the MRP configuration settings to ensure that they are correctly set up for the materials being processed.
  Run MRP Again: After making any necessary corrections, run the MRP process again to see if the error persists.
  Consult SAP Notes: Check the SAP Support Portal for any relevant SAP Notes that may address this specific error or provide additional troubleshooting steps.
  
  Related Information:
  
  Transaction Codes: Familiarize yourself with relevant transaction codes such as MM03 (Material Master), ME01 (Source List), and MD01 (MRP Run).
  SAP Documentation: Refer to SAP Help documentation for detailed information on MRP processes and material substitution.
  User Forums: Consider checking SAP community forums or user groups for discussions related to this error, as other users may have encountered and resolved similar issues.
  
  If the problem persists after following these steps, it may be beneficial to involve your SAP support team or consult with an SAP expert for further assistance.