How To Fix O8401 - Transport unit number missing in position & on TU Assignment Screen

O8401 - Overview

• Message type: E = Error

• Message class: O8 - IS-Oil: TD Transportation and Distribution

• Message number: 401

• Message text: Transport unit number missing in position & on TU Assignment Screen

What causes this issue?

The transport unit number is missing on the TU Assignment Screen.

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?

Either enter a transport unit number next to all sequence numbers, or
delete the unnecessary entries.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message O8401 - Transport unit number missing in position & on TU Assignment Screen ?

  The SAP error message O8401, which states "Transport unit number missing in position & on TU Assignment Screen," typically occurs in the context of handling transportation units (TUs) in the SAP Extended Warehouse Management (EWM) module. This error indicates that the system expects a transport unit number to be present in a specific position, but it is missing.
  
  Cause:
  
  Missing Transport Unit Number: The most straightforward cause is that the transport unit number has not been assigned or entered in the system.
  Incorrect Configuration: There may be configuration issues in the EWM settings that prevent the transport unit from being recognized.
  Data Entry Error: Users may have inadvertently skipped entering the transport unit number or made a mistake during data entry.
  System Bugs or Inconsistencies: Occasionally, bugs or inconsistencies in the system can lead to this error.
  
  
  Solution:
  
  
  Check Transport Unit Assignment:
  
  Navigate to the TU Assignment Screen and verify if the transport unit number is indeed missing.
  If