How To Fix BC056 - Only one dominant can be defined per day

SAP Error Message - Details

• Message type: E = Error

• Message class: BC - Scheduler (calendar)

• Message number: 056

• Message text: Only one dominant can be defined per day

What causes this issue?

You have attempted to maintain a dominant for &V1&, but a dominant
already exists for this day.

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?

Check the selected date.
Correct the date, or change or delete the dominant of the specified
day, as appropriate.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message BC056 - Only one dominant can be defined per day ?

  The SAP error message BC056 "Only one dominant can be defined per day" typically occurs in the context of defining dominant personnel assignments or roles within the SAP system, particularly in modules related to Human Resources (HR) or Organizational Management (OM). This error indicates that the system has detected an attempt to assign multiple dominant roles or positions to a single employee for the same day, which is not allowed.
  Cause:
  
  Multiple Assignments: The primary cause of this error is that there are multiple dominant assignments (e.g., positions, roles) being defined for the same employee on the same date.
  Data Entry Error: It may arise from incorrect data entry or configuration in the system where the same employee is mistakenly assigned to more than one dominant role for a single day.
  System Configuration: The system may be configured to allow only one dominant role per employee per day, which is a common practice to avoid conflicts in reporting and role assignments.
  
  Solution:
  
  Review Assignments: Check the employee's assignments for the specific date in question. Ensure that there is only one dominant role assigned.
  Correct Data: If multiple roles are found, determine which role should be the dominant one and remove or adjust the others accordingly.
  Use Valid Dates: If you need to assign multiple roles, consider assigning them on different dates to comply with the system's restrictions.
  Consult Documentation: Refer to SAP documentation or guidelines for managing personnel assignments to ensure compliance with best practices.
  System Configuration: If necessary, consult with your SAP administrator or technical team to review the configuration settings related to dominant roles and see if adjustments can be made to accommodate your business needs.
  
  Related Information:
  
  Transaction Codes: You may need to use transaction codes like PA30 (Maintain HR Master Data) or PPOME (Display Organizational Plan) to review and modify employee assignments.
  SAP Notes: Check for any relevant SAP Notes or updates that may address this issue or provide additional guidance.
  User Roles: Ensure that the user has the appropriate permissions to make changes to personnel assignments.
  Testing: After making changes, test the assignments in a development or quality assurance environment before applying them in production to avoid further issues.
  
  If the problem persists after following these steps, it may be beneficial to reach out to SAP support or your internal IT team for further assistance.