How To Fix W0120 - One-time customer is maintained, but ID allowing 1x customers not set

SAP Error Message - Details

• Message type: E = Error

• Message class: W0 - Customizing - ISR

• Message number: 120

• Message text: One-time customer is maintained, but ID allowing 1x customers not set

What causes this issue?

You entered a one-time customer number but did not select the indicator
allowing one-time customers.

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?

Set the indicator allowing one-time customers or delete the
<DS:GLOS.3526BFC5AFAB52B9E10000009B38F974>one-time customer number</>.

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 W0120 - One-time customer is maintained, but ID allowing 1x customers not set ?

  Certainly! Here's a detailed explanation for the SAP error message:
  
  SAP Error Message:
  W0120 - One-time customer is maintained, but ID allowing 1x customers not set
  
  Cause:
  This warning message occurs when a customer master record is maintained as a one-time customer (i.e., a customer that is used only once, typically for ad-hoc or infrequent transactions), but the system settings or configuration do not allow the use of one-time customers because the relevant ID or flag enabling one-time customers is not set.
  In SAP, one-time customers are special customer master records that are used for occasional customers without creating a full customer master record. To use one-time customers, certain configuration settings must be enabled.
  
  Explanation:
  
  The customer master record has the "One-time customer" indicator set.
  However, the system configuration (usually in the sales area or customer master settings) does not have the ID allowing one-time customers activated.
  This inconsistency triggers the warning message W0120.
  
  
  Solution:
  
  
  Check the Customer Master Record:
  
  Verify if the customer is marked as a one-time customer.
  Transaction: XD03 (Display Customer) or VD03 (Display Customer - Sales Area).
  
  
  
  Check Configuration for One-time Customers:
  
  Go to SPRO ? Sales and Distribution ? Master Data ? Business Partner ? Customers ? Customer Master ? One-time Customer settings.
  Ensure that the Customer Account Group used for one-time customers is properly configured.
  The account group must have the "One-time customer" indicator set.
  
  
  
  Set the ID Allowing One-time Customers:
  
  In the customer account group configuration (Transaction: OBD2), check if the account group is allowed to be used for one-time customers.
  If not, either:
  
  Change the customer master record to a regular customer (remove the one-time customer flag), or
  Adjust the account group settings to allow one-time customers.
  
  
  
  
  
  Adjust Sales Area Data:
  
  Sometimes, the sales area data for the customer may not be consistent with the one-time customer settings.
  Verify sales area data and ensure it aligns with the one-time customer usage.
  
  
  
  
  Additional Information:
  
  One-time customers are typically used to avoid creating a full customer master record for infrequent customers.
  The system uses a special customer number (often a dummy number) for one-time customers.
  Proper configuration is essential to avoid inconsistencies and errors.
  This warning does not necessarily stop processing but indicates a potential configuration or master data issue that should be corrected.
  
  
  Summary:
  
  
  
  Aspect
  Details
  
  
  
  
  Cause
  Customer marked as one-time customer, but system configuration does not allow it.
  
  
  Solution
  Adjust customer master or account group settings to enable one-time customers.
  
  
  Transaction Codes
  XD03 (Display Customer), OBD2 (Change Account Group), SPRO (Configuration)
  
  
  Notes
  Ensure consistency between customer master data and system configuration for one-time customers.
  
  
  
  
  If you need step-by-step guidance on changing the account group or customer master data, please let me know!