How To Fix WY177 - Check for duplicates cannot be carried out

SAP Error Message - Details

• Message type: E = Error

• Message class: WY - Supplier Master

• Message number: 177

• Message text: Check for duplicates cannot be carried out

What causes this issue?

The check for duplicates cannot be carried out as an error occurred
during the calling of the function module &V1&.
It has to do with error &V2& of the message class &V3&.

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?

Inform your system administrator of the name of the function module,
the message class and the error 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 WY177 - Check for duplicates cannot be carried out ?

  SAP Error Message:
  
  WY177 - Check for duplicates cannot be carried out
  
  Cause:
  The error message WY177 typically occurs during the creation or processing of business documents (such as sales orders, deliveries, or billing documents) in SAP when the system attempts to perform a duplicate check but cannot complete it. This usually happens because:
  
  The duplicate check is activated in the system, but the necessary data or configuration to perform the check is missing or incomplete.
  The system is unable to access the relevant database tables or indexes required for the duplicate check.
  There is a mismatch or inconsistency in the duplicate check settings (e.g., in the sales document type, delivery type, or billing type).
  Custom enhancements or user exits related to duplicate checks are incorrectly implemented or missing.
  The duplicate check logic is triggered but the required fields (like document number, customer, material, date, etc.) are not properly filled or available.
  
  
  Solution:
  To resolve the WY177 error, consider the following steps:
  
  
  Check Duplicate Check Configuration:
  
  Go to the relevant IMG path depending on the document type:
  
  For Sales Orders: SPRO -> Sales and Distribution -> Sales -> Sales Documents -> Sales Document Header -> Define Duplicate Check
  For Deliveries: SPRO -> Logistics Execution -> Shipping -> Deliveries -> Define Duplicate Check
  For Billing Documents: SPRO -> Sales and Distribution -> Billing -> Billing Documents -> Define Duplicate Check
  
  
  Verify that the duplicate check is properly configured for the document type you are processing.
  Ensure that the fields used for duplicate checking are correctly maintained.
  
  
  
  Verify Master Data and Document Data:
  
  Ensure that all mandatory fields required for the duplicate check are filled in the document.
  Check if the customer master, material master, and other relevant master data are consistent and complete.
  
  
  
  Check for Custom Enhancements/User Exits:
  
  If there are any custom user exits or BAdIs implemented for duplicate checks, verify that they are correctly coded and do not cause errors.
  Debug the duplicate check logic to identify where it fails.
  
  
  
  Database and Indexes:
  
  Ensure that the database tables involved in the duplicate check are not locked or corrupted.
  Run database consistency checks if necessary.
  
  
  
  SAP Notes and Support:
  
  Search for SAP Notes related to message WY177 for your specific SAP version and module.
  Apply any relevant SAP Notes or patches.
  
  
  
  Temporary Workaround:
  
  If urgent processing is required and duplicate check is not critical, you may temporarily deactivate the duplicate check in configuration (not recommended for long term).
  
  
  
  
  Related Information:
  
  
  Duplicate Check Functionality:
  
  SAP uses duplicate checks to prevent the creation of identical documents that could cause data inconsistencies or business errors.
  
  
  Common Modules Affected:
  
  Sales and Distribution (SD), Logistics Execution (LE), Billing (FI-CA, SD-BIL).
  
  
  Transaction Codes:  
  
  VA01/VA02 (Sales Order)  
  VL01N/VL02N (Delivery)  
  VF01/VF02 (Billing)
  
  
  
  Debugging:
  
  Use transaction SE91 to display message WY177 and check its text and class. Use SE80 or SE37 to find the function module or program where the duplicate check is performed and debug.
  
  
  
  If you provide the exact transaction or process where the error occurs, I can give more tailored advice.