How To Fix CY735 - Order & operation & starts before basic start date of order

SAP Error Message - Details

• Message type: E = Error

• Message class: CY - Capacity Requirements Planning

• Message number: 735

• Message text: Order & operation & starts before basic start date of order

What causes this issue?

The operation has been dispatched to a time before the order start date
or no remaining available capacity could be found within the basic
dates.

How to fix this error?

Reschedule the operation manually or
reschedule another commitment or
increase the available capacity.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message CY735 - Order & operation & starts before basic start date of order ?

  The SAP error message CY735 indicates that there is a scheduling issue with a production order or operation. Specifically, it means that the start date of an operation is set to begin before the basic start date of the order. This can occur in various scenarios, such as when the scheduling parameters are not correctly configured or when there are conflicts in the order's timeline.
  Cause:
  
  Incorrect Scheduling Parameters: The scheduling parameters for the order or operation may not be set correctly, leading to a conflict in the start dates.
  Manual Changes: If someone manually adjusted the start date of the operation without considering the basic start date of the order, this error can occur.
  Dependencies: There may be dependencies or constraints that are not being respected, such as predecessor operations that have not been completed.
  Capacity Constraints: If there are capacity constraints in the work center, it may lead to scheduling conflicts.
  
  Solution:
  
  Check Order Dates: Review the basic start date of the order and ensure that all operations are scheduled to start on or after this date.
  Adjust Operation Dates: Modify the start date of the operation to ensure it aligns with the basic start date of the order.
  Review Scheduling Parameters: Check the scheduling parameters in the order and ensure they are set correctly. This includes lead times, float times, and any other relevant settings.
  Check Dependencies: Ensure that all predecessor operations are completed before the operation in question is scheduled to start.
  Capacity Planning: Review the capacity planning for the work center to ensure that there are no conflicts that would cause the operation to be scheduled incorrectly.
  Re-schedule the Order: If necessary, re-schedule the entire order to ensure that all operations are aligned with the correct start dates.
  
  Related Information:
  
  Transaction Codes: You can use transaction codes like CO02 (Change Production Order) to review and adjust the order details.
  Scheduling Settings: Familiarize yourself with the scheduling settings in SAP, including backward and forward scheduling, to better understand how dates are calculated.
  Documentation: Refer to SAP documentation or help files for more detailed information on production order scheduling and error messages.
  
  By following these steps, you should be able to resolve the CY735 error and ensure that your production orders are scheduled correctly.