How To Fix UIU_SRV018 - Contact person &1 is not a valid customer in the system

SAP Error Message - Details

• Message type: E = Error

• Message class: UIU_SRV - service order message class

• Message number: 018

• Message text: Contact person &1 is not a valid customer in the system

Self-Explanatory Message

Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of messages in the SAP system have a message text, however this is frequently insufficient to comprehend or resolve the problem.

To make things easier, more detailed information is frequently added to describe the issue, how to fix it, and the necessary steps or configuration modifications.

Unfortunately, there isn't any extra information in this error notice.

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Smart SAP Assistant

• What is the cause and solution for SAP error message UIU_SRV018 - Contact person &1 is not a valid customer in the system ?

  The SAP error message UIU_SRV018 indicates that the contact person specified in a transaction or process is not recognized as a valid customer in the system. This can occur in various scenarios, such as when creating or updating customer records, sales orders, or other related documents.
  
  Cause:
  
  Invalid Customer Number: The contact person number provided does not exist in the customer master data.
  Inactive Customer: The customer record may exist but is marked as inactive or blocked.
  Data Entry Error: There may be a typographical error in the contact person's ID or name.
  Missing Assignment: The contact person may not be properly assigned to the customer account.
  Data Synchronization Issues: If the system is integrated with other systems, there may be synchronization issues leading to missing or outdated data.
  
  
  Solution:
  
  
  Verify Customer Data:
  
  Check the customer master data in the SAP system to ensure that the contact person exists and is active.
  Use transaction codes like XD03 (Display Customer) to