How To Fix WY020 - Planning calendar & for plant & not allowed (see table t439H)

SAP Error Message - Details

• Message type: E = Error

• Message class: WY - Supplier Master

• Message number: 020

• Message text: Planning calendar & for plant & not allowed (see table t439H)

Self-Explanatory Message

Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of messages in the SAP system have a message text, however this is frequently insufficient to comprehend or resolve the problem.

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.

Unfortunately, there isn't any extra information in this error notice.

What else can you do?

First, use our AnswerBot below to get a possible cause and solution (requires a premium subscription).

Also, review the in-depth Common Questions & Answers listed below; you could discover a solution there or be able to connect with others who have faced similar challenges.

You can also try searching the SAP support portal (support.sap.com) but you need a special user ID to access it. It is possible that an SAP support note exists that provides additional details about the mistake or even steps for fixing it.

Smart SAP Assistant

• What is the cause and solution for SAP error message WY020 - Planning calendar & for plant & not allowed (see table t439H) ?

  The SAP error message:
  WY020: Planning calendar & for plant & not allowed (see table T439H)
  
  Cause:
  This error occurs when the planning calendar assigned to a particular plant is not allowed or not maintained in the system. Specifically, the system checks the assignment of planning calendars to plants in table T439H. If the planning calendar you are trying to use or assign to a plant is not found or not allowed in this table, the system throws this error.
  
  Explanation:
  
  Planning Calendar: Defines the working days, holidays, and special days for scheduling and planning purposes.
  Plant: Organizational unit in SAP representing a manufacturing location or site.
  Table T439H: Stores the allowed combinations of planning calendars and plants.
  
  The system uses this table to validate whether a particular planning calendar can be used for a given plant.
  
  Solution:
  
  
  Check Table T439H:
  
  Go to transaction SE16N or SE16.
  Enter table name T439H.
  Check if the planning calendar and plant combination exists.
  
  
  
  Maintain the Planning Calendar for the Plant:
  
  If the combination does not exist, you need to maintain it.
  Use transaction OPPR (Maintain Planning Calendars) or OPPR to create or assign planning calendars.
  Alternatively, use transaction SPRO:
  
  Navigate to:
  
  Logistics ? Production ? Basic Data ? Work Center ? Define Planning Calendar
  Assign the planning calendar to the plant.
  
  
  
  
  
  Verify the Planning Calendar:
  
  Ensure the planning calendar is correctly defined and active.
  Check for any inconsistencies or missing data in the calendar.
  
  
  
  Re-try the operation:
  
  After maintaining the correct assignment, retry the process that caused the error.
  
  
  
  
  Additional Information:
  
  This error is common during production order creation, capacity planning, or work center scheduling when the system tries to determine the working times based on the planning calendar.
  Proper maintenance of planning calendars and their assignment to plants is crucial for accurate scheduling and capacity planning.
  If multiple plants use different calendars, ensure each plant has the correct calendar assigned.
  
  
  Summary:
  
  
  
  Aspect
  Details
  
  
  
  
  Error Message
  WY020 Planning calendar & for plant & not allowed (see table T439H)
  
  
  Cause
  Planning calendar not assigned to plant in T439H
  
  
  Solution
  Assign the planning calendar to the plant in T439H via OPPR or SPRO
  
  
  Related Table
  T439H (Planning calendar - Plant assignment)
  
  
  Transactions
  SE16N (view T439H), OPPR (maintain planning calendar), SPRO (configuration)
  
  
  
  
  If you need further help, please provide the exact transaction or process where the error occurs, and I can guide you more specifically.