How To Fix IM201 - Please enter class (class hierarchy root)

SAP Error Message - Details

• Message type: E = Error

• Message class: IM - Maintenance notifications

• Message number: 201

• Message text: Please enter class (class hierarchy root)

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.

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Smart SAP Assistant

• What is the cause and solution for SAP error message IM201 - Please enter class (class hierarchy root) ?

  The SAP error message IM201 ("Please enter class (class hierarchy root)") typically occurs in the context of the SAP Plant Maintenance (PM) or Materials Management (MM) modules when you are trying to create or manage a classification for a material or equipment, and the system requires a class to be specified.
  Cause:
  The error is usually caused by one of the following reasons:
  
  Missing Class: You have not entered a class for the object you are trying to classify.
  Incorrect Class Hierarchy: The class you are trying to use may not be defined correctly in the class hierarchy.
  Authorization Issues: You may not have the necessary authorizations to access or create the class.
  Configuration Issues: There may be issues with the configuration of the classification system in your SAP environment.
  
  Solution:
  To resolve the IM201 error, you can take the following steps:
  
  
  Enter a Class:
  
  When prompted for a class, ensure that you enter a valid class that exists in the system. You can use the search help (F4) to find available classes.
  
  
  
  Check Class Hierarchy:
  
  Verify that the class you are trying to use is correctly defined in the class hierarchy. You can do this by navigating to the classification view and checking the hierarchy.
  
  
  
  Create a Class:
  
  If the required class does not exist, you may need to create a new class. You can do this using transaction code CL02 (Change Class) or CL01 (Create Class).
  
  
  
  Authorization Check:
  
  Ensure that you have the necessary authorizations to create or modify classes. If you suspect authorization issues, contact your SAP security administrator.
  
  
  
  Configuration Review:
  
  If you are an SAP administrator, review the configuration settings for the classification system to ensure everything is set up correctly.
  
  
  
  Consult Documentation:
  
  Refer to SAP documentation or help resources for more detailed guidance on classification and class hierarchy.
  
  
  
  Related Information:
  
  Transaction Codes:
  
  CL01: Create Class
  CL02: Change Class
  CL03: Display Class
  
  
  SAP Notes: Check for any relevant SAP Notes that might address specific issues related to classification and the IM201 error.
  SAP Community: Engage with the SAP Community forums for additional insights and solutions from other users who may have encountered the same issue.
  
  By following these steps, you should be able to resolve the IM201 error and successfully enter the required class in your SAP system.