How To Fix /SAPAPO/OM_ERROR198 - Negative processing time not allowed for scheduling

SAP Error Message - Details

• Message type: E = Error

• Message class: /SAPAPO/OM_ERROR -

• Message number: 198

• Message text: Negative processing time not allowed for scheduling

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message /SAPAPO/OM_ERROR198 - Negative processing time not allowed for scheduling ?

  The SAP error message /SAPAPO/OM_ERROR198 indicates that there is a negative processing time being used in the scheduling of operations within the Advanced Planning and Optimization (APO) module. This error typically arises when the system encounters a situation where the calculated processing time for an operation is less than zero, which is not permissible in scheduling scenarios.
  Cause:
  
  Negative Processing Time: The most common cause is that the processing time for a specific operation has been set to a negative value, either in the master data (like the production version or routing) or in the planning parameters.
  Incorrect Data Entry: There may be incorrect data entries in the master data, such as in the routing or production version.
  Scheduling Parameters: The scheduling parameters might be incorrectly configured, leading to unrealistic calculations.
  Capacity Constraints: If there are capacity constraints that are not properly defined, it may lead to negative processing times during scheduling.
  
  Solution:
  
  Check Master Data: Review the master data for the relevant material, including the routing and production version. Ensure that all processing times are set correctly and are non-negative.
  Review Scheduling Parameters: Check the scheduling parameters in the APO system. Ensure that they are configured correctly and that there are no constraints that could lead to negative processing times.
  Adjust Capacity Planning: If capacity constraints are causing the issue, review and adjust the capacity planning settings to ensure they align with the production requirements.
  Recalculate: After making the necessary adjustments, recalculate the planning run to see if the error persists.
  Consult Documentation: Refer to SAP documentation or notes related to this error for any specific guidelines or patches that may address the issue.
  
  Related Information:
  
  Transaction Codes: You may need to use transaction codes like /SAPAPO/OM_ORDER to analyze the order and its scheduling details.
  SAP Notes: Check for any relevant SAP Notes that might provide additional insights or fixes related to this error.
  APO Configuration: Familiarize yourself with the configuration settings in APO, especially those related to production planning and scheduling.
  Testing: After making changes, conduct thorough testing to ensure that the issue is resolved and that no new issues arise from the changes made.
  
  If the problem persists after following these steps, it may be beneficial to consult with an SAP expert or reach out to SAP support for further assistance.