Message type: E = Error
Message class:  WES_OUTBOUND - Messages for Outbound Services 
Message number: 319
Message text: No master data found for material &1
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SAP Error Message: WES_OUTBOUND319 No master data found for material &1
Cause: This error occurs when the SAP system tries to process or send outbound data (e.g., through IDocs or interfaces) related to a material, but the master data for the specified material number (&1 is a placeholder for the actual material number) is not found or not maintained in the system. Common scenarios include: The material does not exist in the SAP system. The material master record is incomplete or missing in the relevant views. The material master data is not extended to the required plant or sales organization. The material master data is not released or flagged for the relevant process. The interface or outbound process is referencing an incorrect or obsolete material number.
Solution: Verify Material Master Data: Use transaction MM03 to check if the material exists. Confirm that the material master is maintained correctly in all required views (Basic Data, Sales, Plant Data, etc.). Check if the material is extended
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