How To Fix RU228 - Start date cannot be determined (calendar &)

SAP Error Message - Details

• Message type: E = Error

• Message class: RU - Messages for order completion confirmation

• Message number: 228

• Message text: Start date cannot be determined (calendar &)

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message RU228 - Start date cannot be determined (calendar &) ?

  The SAP error message RU228, which states "Start date cannot be determined (calendar &)," typically occurs in the context of scheduling or planning activities within SAP, particularly in modules like SAP Project System (PS) or SAP Production Planning (PP). This error indicates that the system is unable to determine a valid start date for a task or activity due to issues with the calendar settings or the configuration of the scheduling parameters.
  Causes:
  
  Missing or Incorrect Calendar Assignment: The calendar that is supposed to be used for scheduling may not be assigned to the project, task, or resource correctly.
  Invalid Calendar Settings: The calendar itself may have incorrect settings, such as non-working days or holidays that are not configured properly.
  Task Dependencies: If there are dependencies between tasks, and the predecessor task does not have a valid end date, the system may not be able to calculate the start date for the subsequent task.
  Resource Availability: If the resources assigned to the task are not available during the planned time frame, the system may not be able to determine a valid start date.
  Configuration Issues: There may be issues with the configuration of the project or planning parameters that prevent the system from calculating dates correctly.
  
  Solutions:
  
  Check Calendar Assignment: Ensure that the correct calendar is assigned to the project, task, or resource. You can do this by navigating to the relevant settings in the project or resource master data.
  Review Calendar Settings: Verify the settings of the calendar being used. Check for any non-working days, holidays, or other configurations that might affect scheduling.
  Examine Task Dependencies: Review the dependencies between tasks to ensure that all predecessor tasks have valid end dates. Adjust the scheduling as necessary.
  Resource Availability Check: Ensure that the resources required for the task are available during the planned time frame. If not, adjust the resource allocation or the task schedule.
  Configuration Review: If the issue persists, review the configuration settings related to project scheduling and planning. Consult with your SAP administrator or a functional consultant if necessary.
  
  Related Information:
  
  Transaction Codes: You may use transaction codes like CJ20N (Project Builder) or CJI3 (Project Actual Line Items) to check project details and scheduling.
  SAP Notes: Check for any relevant SAP Notes that may address this specific error or provide additional troubleshooting steps.
  Documentation: Refer to SAP documentation for detailed information on project scheduling and calendar settings.
  
  If the problem continues after trying the above solutions, it may be beneficial to consult with your SAP support team or a functional consultant who specializes in the relevant module.