How To Fix C1172 - Enter a class and a class type

SAP Error Message - Details

• Message type: E = Error

• Message class: C1 - Characteristics maintenance messages

• Message number: 172

• Message text: Enter a class and a class type

What causes this issue?

A characteristic of data type UDEF (user-defined data type) must
contain both a class and a class type. At least one of these entries is
missing.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message C1172 - Enter a class and a class type ?

  The SAP error message C1172 ("Enter a class and a class type") typically occurs in the context of class management in SAP, particularly when working with classification systems. This error indicates that the system requires both a class and a class type to proceed, but one or both of these fields have not been filled in.
  Cause:
  
  Missing Input: The user has not entered a class or a class type in the relevant fields.
  Incorrect Navigation: The user may have navigated to a screen or transaction that requires these inputs but did not provide them.
  Configuration Issues: There may be issues with the configuration of the classification system in SAP, leading to the requirement for these fields not being properly set.
  
  Solution:
  
  
  Enter Required Fields: Ensure that both the class and class type fields are filled in correctly. 
  
  Class: This is typically a specific category or grouping for the object you are classifying.
  Class Type: This defines the type of class (e.g., material class, equipment class, etc.).
  
  
  
  Check Configuration: If you are an administrator or have access to configuration settings, check the classification settings in the system to ensure that the classes and class types are properly defined and active.
  
  
  Review Documentation: Consult SAP documentation or help resources for guidance on the specific transaction or process you are working with to ensure you are following the correct steps.
  
  
  User Training: If this error is occurring frequently among users, consider providing additional training on how to use the classification features in SAP.
  
  
  Consult SAP Support: If the issue persists and you suspect it may be a system error or bug, consider reaching out to SAP support for further assistance.
  
  
  Related Information:
  
  Transaction Codes: Familiarize yourself with relevant transaction codes related to classification, such as CL02 (Change Class) or CL03 (Display Class).
  SAP Notes: Check for any SAP Notes related to classification errors that may provide additional insights or patches.
  User Roles: Ensure that users have the appropriate roles and permissions to access and modify classification data.
  
  By addressing the missing inputs and ensuring proper configuration, you should be able to resolve the C1172 error in SAP.