How To Fix /SAPAPO/OPT_VSR_MSG504 - Duration from prev. stop to stop &1 at loc. &2 of sched. &3 must be >=0

SAP Error Message - Details

• Message type: E = Error

• Message class: /SAPAPO/OPT_VSR_MSG -

• Message number: 504

• Message text: Duration from prev. stop to stop &1 at loc. &2 of sched. &3 must be >=0

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message /SAPAPO/OPT_VSR_MSG504 - Duration from prev. stop to stop &1 at loc. &2 of sched. &3 must be >=0 ?

  The SAP error message /SAPAPO/OPT_VSR_MSG504 indicates that there is an issue with the scheduling of operations in the Advanced Planning and Optimization (APO) module. Specifically, the error states that the duration from the previous stop to the current stop at a specified location must be greater than or equal to zero. This typically means that there is a scheduling conflict or an inconsistency in the planned operations.
  Cause:
  
  Negative Duration: The most common cause of this error is that the planned duration between two operations (stops) is negative. This can happen if the end time of the previous operation is later than the start time of the current operation.
  Incorrect Scheduling Parameters: There may be incorrect settings in the scheduling parameters, such as lead times, processing times, or setup times.
  Data Inconsistencies: There could be inconsistencies in the master data, such as incorrect routing or production versions.
  Resource Availability: The resource assigned to the operation may not be available during the planned time, leading to scheduling conflicts.
  
  Solution:
  
  Check Operation Times: Review the planned start and end times of the operations involved. Ensure that the end time of the previous operation is not later than the start time of the current operation.
  Adjust Scheduling Parameters: Verify and adjust the scheduling parameters, such as lead times and processing times, to ensure they are set correctly.
  Review Master Data: Check the master data for the materials, resources, and routings involved. Ensure that there are no discrepancies that could lead to scheduling issues.
  Resource Availability: Ensure that the resources required for the operations are available during the planned times. If necessary, adjust the resource allocation or scheduling.
  Re-schedule: If changes are made, re-schedule the operations to see if the error persists.
  
  Related Information:
  
  Transaction Codes: You may use transaction codes like /SAPAPO/OPT1 for planning and scheduling or /SAPAPO/SDP94 for viewing the detailed scheduling information.
  Logs and Messages: Check the logs and messages in the APO system for additional context or related errors that may provide further insight into the issue.
  SAP Notes: Look for relevant SAP Notes that may address known issues or provide additional guidance on resolving this error.
  
  If the problem persists after checking these areas, it may be beneficial to consult with your SAP support team or refer to SAP documentation for more detailed troubleshooting steps.