Message type: E = Error
Message class:  6M - MDM Messages (Plugin) 
Message number: 005
Message text: No customer ID found for partner &.
The processing was aborted because the customer couldn't be found for
the given partner number in the local data base.
Idoc is set to error status.
Try to reprocess all errored IDocs belonging to this customer. Perhaps
there is an IDoc containing the missing customer data record. Once this
could be inbounded the current Idoc will find its customer number and
can be reprocessed as well.
Error message extract from SAP system. Copyright SAP SE.
The SAP error message 6M005: No customer ID found for partner & typically occurs when the system is unable to find a customer ID associated with a specific partner in the system. This can happen in various scenarios, such as during the creation of sales orders, billing documents, or when processing customer-related transactions. Causes: Missing Customer Master Data: The customer ID may not have been created in the system, or it may have been deleted. Incorrect Partner Function: The partner function being used may not be correctly assigned to the customer or may not exist. Data Inconsistency: There may be inconsistencies in the data, such as incorrect entries in the partner determination procedure.
Configuration Issues: The configuration settings for partner determination may not be set up correctly in the relevant sales area or organizational unit. Authorization Issues: The user may not have the necessary authorizations to view or access the customer data. Solutions: Check Customer Master Data: Verify if
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