How To Fix 12138 - Enter a valid week

12138 - Overview

• Message type: E = Error

• Message class: 12 - Herstelldatum/Mindesthaltbarkeitsdatum/Chargen

• Message number: 138

• Message text: Enter a valid week

What causes this issue?

You have entered a date in a screen field to which a period indicator
is assigned. This period indicator contains the value = 'week'.
The date you have entered does not have the correct format (WW.YYYY)

How to fix this error?

Enter the date in the correct format.

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

Error message extract from SAP system. Copyright SAP SE.

12138 - Details

• The SAP error message 12138, "Enter a valid week," typically occurs when a user is trying to enter a week number in a field that requires a valid week format, but the input does not meet the expected criteria. This error can arise in various contexts, such as during planning, reporting, or data entry processes.
  Causes:
  
  Invalid Week Number: The week number entered may be outside the acceptable range (e.g., 1-52 or 1-53, depending on the year).
  Incorrect Format: The week number may not be in the correct format (e.g., it may include letters or special characters).
  Calendar Settings: The system's calendar settings may not align with the week number being entered (e.g., fiscal calendar vs. calendar year).
  User Input Error: Simple typographical errors or misunderstandings about the week numbering system.
  
  Solutions:
  
  Check Week Number: Ensure that the week number you are entering is valid for the current year. For example, if you are in a year