How To Fix P2789 - Unable to determine dates for start and end of generation

SAP Error Message - Details

• Message type: E = Error

• Message class: P2 - Messages for HR Time Management

• Message number: 789

• Message text: Unable to determine dates for start and end of generation

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message P2789 - Unable to determine dates for start and end of generation ?

  The SAP error message P2789, "Unable to determine dates for start and end of generation," typically occurs in the context of production planning or scheduling within SAP systems, particularly when dealing with generation of production orders, planning orders, or similar processes.
  Causes:
  
  
  Missing or Incorrect Data: The system may not have the necessary data to determine the start and end dates for the generation. This could be due to missing master data, such as production versions, routing, or work center information.
  
  
  Configuration Issues: There may be configuration issues in the planning parameters or settings that prevent the system from calculating the dates correctly.
  
  
  Date Constraints: If there are constraints or dependencies that are not met (e.g., resource availability, lead times), the system may be unable to determine valid dates.
  
  
  Versioning Issues: If there are multiple versions of a production order or planning order, the system may struggle to identify which version to use for date calculations.
  
  
  User Input Errors: Incorrect input parameters during the planning or scheduling process can lead to this error.
  
  
  Solutions:
  
  
  Check Master Data: Ensure that all relevant master data (materials, BOMs, routings, work centers) is correctly maintained and up to date.
  
  
  Review Planning Parameters: Check the configuration settings in the planning parameters to ensure they are set correctly for the production process.
  
  
  Validate Date Constraints: Review any constraints or dependencies that may affect the scheduling of the production order. Ensure that resources are available and that lead times are respected.
  
  
  Check for Version Conflicts: If applicable, ensure that the correct version of the production order or planning order is being used.
  
  
  Input Validation: Double-check the input parameters provided during the planning or scheduling process to ensure they are correct and complete.
  
  
  Consult Documentation: Refer to SAP documentation or help resources for specific guidance related to the error message and the context in which it occurs.
  
  
  Debugging: If you have access to technical resources, consider debugging the process to identify where the date determination is failing.
  
  
  Related Information:
  
  Transaction Codes: Familiarize yourself with relevant transaction codes such as MD01 (MRP Run), CO01 (Create Production Order), or COHV (Production Order Queue) that may be involved in the process.
  SAP Notes: Check SAP Notes for any known issues or patches related to this error message.
  Community Forums: Engage with SAP community forums or support channels for additional insights and solutions from other users who may have encountered the same issue.
  
  If the problem persists after trying the above solutions, it may be beneficial to consult with your SAP support team or a technical consultant who can provide more in-depth analysis and assistance.