How To Fix C1101 - Entry required indicator cannot be set

SAP Error Message - Details

• Message type: E = Error

• Message class: C1 - Characteristics maintenance messages

• Message number: 101

• Message text: Entry required indicator cannot be set

What causes this issue?

You want to set the "Entry required" indicator, so that a value has to
be assigned to this characteristic.
Objects have already been classified using this class. An analysis of
values already assigned has shown that, in one or more cases, no value
has been assigned to the characteristic. This contradicts the above
indicator.

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?

Deselect the field.
If you really want to enter this indicator, first check all values
assigned to this characteristic and assign values wherever no value has
been assigned.
If you choose <LS> Environment -> Where-used list</> from the
characteristics maintenance menu, you can find out where the
characteristic has been used.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message C1101 - Entry required indicator cannot be set ?

  The SAP error message C1101, which states "Entry required indicator cannot be set," typically occurs in the context of configuration or data entry in SAP, particularly when dealing with master data or transaction data. This error indicates that there is an issue with the settings or the data being entered that prevents the system from allowing the "Entry required" indicator to be set.
  Causes:
  
  Field Configuration: The field in question may be configured in such a way that it does not allow the "Entry required" indicator to be set. This could be due to the field's data type or its settings in the configuration.
  Data Inconsistency: There may be inconsistencies in the data being entered, such as missing mandatory fields or incorrect data types.
  Authorization Issues: The user may not have the necessary authorizations to change the settings of the field or to set the "Entry required" indicator.
  Custom Code or Enhancements: If there are custom developments or enhancements in the system, they may interfere with the standard behavior of the field.
  
  Solutions:
  
  Check Field Configuration: Review the configuration settings for the field in question. Ensure that it is set up correctly to allow the "Entry required" indicator to be activated.
  Validate Data Entry: Ensure that all required fields are filled out correctly and that the data types match the expected formats. Look for any missing mandatory fields.
  Review Authorizations: Check the user’s authorization profile to ensure they have the necessary permissions to make changes to the field settings.
  Consult with Development Team: If there are custom developments, consult with the development team to see if any custom logic is affecting the field's behavior.
  SAP Notes and Documentation: Search for relevant SAP Notes or documentation that may provide additional insights or solutions related to this error message.
  
  Related Information:
  
  Transaction Codes: Depending on where the error occurs, you may be using transaction codes like MM01 (Create Material), VA01 (Create Sales Order), or others related to master data or transaction processing.
  SAP Support: If the issue persists, consider reaching out to SAP support for assistance, especially if it is a critical issue affecting business processes.
  Testing in Development: If possible, replicate the issue in a development or test environment to better understand the cause without impacting production data.
  
  By following these steps, you should be able to identify the cause of the C1101 error and implement a suitable solution.