How To Fix 5U121 - Enter both number and units or leave both empty

5U121 - Overview

• Message type: E = Error

• Message class: 5U - HR US: Messages

• Message number: 121

• Message text: Enter both number and units or leave both empty

What causes this issue?

You have only partially filled the criteria for the waiting period.

System Response

The system cannot process only one entry of this combination.

How to fix this error?

Enter both the number and unit or leave both fields empty.

Error message extract from SAP system. Copyright SAP SE.

5U121 - Details

• The SAP error message 5U121 ("Enter both number and units or leave both empty") typically occurs in scenarios where a user is required to input a quantity and its corresponding unit of measure, but the input is incomplete or inconsistent. This error is common in various SAP transactions, especially those related to inventory management, material master data, or production planning.
  
  Cause:
  The error arises when:
  
  A user enters a value in the quantity field but leaves the unit of measure field empty.
  A user enters a value in the unit of measure field but leaves the quantity field empty.
  Both fields are filled, but the values do not correspond correctly (e.g., a unit of measure that does not match the quantity).
  
  
  Solution:
  To resolve this error, you should ensure that:
  
  
  Both Fields are Filled: If you are entering a quantity, make sure to also enter a corresponding unit of measure. For example, if you enter "10" in the