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

MD_SUBSTN051 - Overview

• 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