How To Fix MD855 - Error determining duration of working time

SAP Error Message - Details

• Message type: E = Error

• Message class: MD - Material Requirements Planning (MRP)

• Message number: 855

• Message text: Error determining duration of working time

Self-Explanatory Message

Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of messages in the SAP system have a message text, however this is frequently insufficient to comprehend or resolve the problem.

To make things easier, more detailed information is frequently added to describe the issue, how to fix it, and the necessary steps or configuration modifications.

Unfortunately, there isn't any extra information in this error notice.

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Smart SAP Assistant

• What is the cause and solution for SAP error message MD855 - Error determining duration of working time ?

  The SAP error message MD855, which states "Error determining duration of working time," typically occurs in the context of production planning and scheduling. This error can arise due to various reasons related to the configuration of working times, calendars, or master data. Here are some common causes, potential solutions, and related information:
  Causes:
  
  Missing or Incorrect Work Schedule: The work schedule for the relevant plant or work center may be missing or incorrectly configured.
  Calendar Issues: The factory calendar or holiday calendar may not be set up correctly, leading to issues in determining available working time.
  Master Data Issues: Problems with master data, such as incorrect or missing data in the material master, work center, or routing, can lead to this error.
  Time Zone Settings: Incorrect time zone settings in the system can also affect the calculation of working time.
  User Parameters: User-specific settings or parameters may not be correctly defined, impacting the working time determination.
  
  Solutions:
  
  Check Work Schedule: Verify that the work schedule is correctly defined for the relevant plant or work center. Ensure that the working hours, breaks, and shifts are properly configured.
  Review Factory Calendar: Ensure that the factory calendar is correctly set up and that it includes all relevant holidays and non-working days.
  Validate Master Data: Check the master data for the material, work center, and routing to ensure that all necessary information is complete and accurate.
  Examine User Settings: Review user-specific settings in the SAP system to ensure that they are correctly configured for the user's role and responsibilities.
  Check Time Zone Settings: Ensure that the time zone settings in the system are correct and consistent with the location of the plant or work center.
  Debugging: If the issue persists, consider using transaction codes like ST22 (dump analysis) or SLG1 (application log) to gather more information about the error.
  
  Related Information:
  
  Transaction Codes: Familiarize yourself with relevant transaction codes such as CR01 (Create Work Center), CR02 (Change Work Center), and CR03 (Display Work Center) to manage work center data.
  SAP Notes: Check for any relevant SAP Notes that may address known issues related to MD855. You can search for notes in the SAP Support Portal.
  Documentation: Review SAP documentation related to production planning and scheduling for best practices in configuring working times and calendars.
  
  If the problem persists after trying the above solutions, it may be beneficial to consult with your SAP support team or a functional consultant who specializes in production planning.