How To Fix VR303 - Blocking key & has incorrect structure

SAP Error Message - Details

• Message type: E = Error

• Message class: VR - Output for SD Reporting

• Message number: 303

• Message text: Blocking key & has incorrect structure

Self-Explanatory Message

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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.

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Smart SAP Assistant

• What is the cause and solution for SAP error message VR303 - Blocking key & has incorrect structure ?

  SAP Error Message:
  
  VR303 - Blocking key & has incorrect structure
  
  Cause:
  The error message VR303 occurs when the blocking key entered in a transaction related to vendor master data (such as in transaction FK02, XK02, or during invoice verification) does not conform to the expected format or structure defined in the system.
  
  Blocking keys are used in SAP to block or unblock vendors or specific vendor data at different organizational levels (company code, purchasing organization, etc.).
  Each blocking key has a predefined structure (length, allowed characters, etc.) configured in the system.
  If the blocking key entered does not match this structure (e.g., wrong length, invalid characters), SAP throws the VR303 error.
  
  
  Typical Scenarios:
  
  Entering a blocking key manually that is not defined or incorrectly formatted.
  Customizing or configuration changes where blocking keys are defined incorrectly.
  Data migration or upload where blocking keys are not validated properly.
  
  
  Solution:
  
  
  Check the Blocking Key Format:
  
  Verify the blocking key you are trying to enter.
  Ensure it matches the format defined in the system (length, allowed characters).
  
  
  
  Review Customizing Settings:
  
  Go to SPRO ? Materials Management ? Purchasing ? Vendor Master ? Blocking ? Define Blocking Keys (or similar path depending on SAP version).
  Check the blocking keys defined for vendors.
  Confirm the structure and allowed values.
  
  
  
  Correct the Blocking Key:
  
  Use a valid blocking key as per the configuration.
  If the blocking key is missing or incorrect, correct it in the transaction.
  
  
  
  If Custom Blocking Keys Are Needed:
  
  Define new blocking keys with correct structure in customizing.
  Transport the changes to the relevant system.
  
  
  
  Data Upload / Migration:
  
  Validate blocking keys in the source data before upload.
  Use proper validation routines or user-exits to check blocking key format.
  
  
  
  
  Related Information:
  
  Transaction Codes: FK02, XK02, FK01, XK01 (Vendor Master changes), MIRO (Invoice Verification)
  Configuration Path:
  
  SPRO ? Materials Management ? Purchasing ? Vendor Master ? Blocking ? Define Blocking Keys
  SAP Notes: Check for any SAP Notes related to VR303 for your SAP version.
  User Exits / BAdIs: Sometimes custom validations are implemented that might cause this error if blocking keys are not as expected.
  
  
  Summary:
  
  Cause: Blocking key entered does not match the expected structure.
  Solution: Use a valid blocking key as per system configuration or adjust configuration to include the required blocking key.
  Check: Vendor master blocking key definitions in customizing and correct the input accordingly.
  
  
  If you provide the exact transaction or context where the error occurs, I can help with more specific steps.