How To Fix MM221 - Maintain the planning calendar for the plant or for its reference plant

MM221 - Overview

• Message type: E = Error

• Message class: MM - Messages for material master maintenance and Customizing

• Message number: 221

• Message text: Maintain the planning calendar for the plant or for its reference plant

What causes this issue?

You have chosen an MRP lot size that requires you to specify a planning
calendar. However, no planning calendar exists for the plant specified
or for its reference plant.

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?

Procedure for System Administrators

INCLUDE OMT4 OBJECT DOKU ID TX LANGUAGE EN
In the standard SAP system, it appears as an error message.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message MM221 - Maintain the planning calendar for the plant or for its reference plant ?

  The SAP error message MM221 indicates that there is an issue with the planning calendar for a specific plant or its reference plant in the Materials Management (MM) module. This error typically arises when the system cannot find a valid planning calendar for the plant in question, which is necessary for various planning and scheduling functions.
  
  Cause:
  
  Missing Planning Calendar: The planning calendar for the specified plant has not been defined or is missing.
  Incorrect Plant Configuration: The plant may not be properly configured in the system, leading to the absence of a planning calendar.
  Reference Plant Issues: If the plant is set to use a reference plant's calendar, the reference plant may also lack a defined planning calendar.
  Authorization Issues: The user may not have the necessary permissions to view or maintain the planning calendar.
  
  
  Solution:
  To resolve the MM221 error, follow these steps:
  
  
  Check Planning Calendar Configuration:
  
  Navigate to the configuration settings for the planning calendar in