How To Fix C7039 - Cannot keep within time constraint

SAP Error Message - Details

• Message type: E = Error

• Message class: C7 - Scheduling

• Message number: 039

• Message text: Cannot keep within time constraint

What causes this issue?

When carrying out scheduling, the system could not keep the time
constraint which you entered for the activity.

System Response

Given this situation, if you carry out backward scheduling, you will
get a negative total float.

How to fix this error?

Check the time constraints entered for the activity.
Check the basic dates for the network in the network header.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message C7039 - Cannot keep within time constraint ?

  The SAP error message C7039, "Cannot keep within time constraint," typically occurs in the context of scheduling or planning within SAP systems, particularly in production planning (PP) or project systems (PS). This error indicates that the system is unable to meet the specified time constraints for a particular operation, task, or process.
  Causes:
  
  Resource Availability: The resources (machines, labor, etc.) required for the operation may not be available within the specified time frame.
  Capacity Constraints: The production capacity may be insufficient to meet the demand within the required time.
  Scheduling Conflicts: There may be overlapping tasks or operations that prevent the system from scheduling the operation within the desired time.
  Incorrect Time Settings: The time settings for the operation, such as lead times, setup times, or processing times, may be incorrectly configured.
  Dependencies: There may be dependencies on other tasks or operations that are not being met, causing delays.
  
  Solutions:
  
  Check Resource Availability: Ensure that the necessary resources are available and not overbooked. You may need to adjust the schedule or allocate additional resources.
  Adjust Capacity Planning: Review and adjust the capacity planning settings to ensure that there is enough capacity to meet the demand.
  Review Scheduling Parameters: Check the scheduling parameters and settings in the system to ensure they are correctly configured.
  Modify Time Constraints: If possible, consider modifying the time constraints for the operation to allow for more flexibility.
  Analyze Dependencies: Review the dependencies between tasks and ensure that all prerequisites are met before scheduling the operation.
  Use Alternative Scheduling Techniques: If the standard scheduling methods are not working, consider using alternative scheduling techniques or tools available in SAP.
  
  Related Information:
  
  Transaction Codes: You may use transaction codes like CM01 (Capacity Planning), C223 (Change Work Center), or C202 (Change Production Order) to analyze and adjust settings related to the error.
  SAP Notes: Check SAP Notes for any known issues or patches related to this error message.
  Documentation: Refer to SAP documentation on production planning and scheduling for best practices and configuration guidelines.
  
  If the issue persists after trying the above solutions, it may be beneficial to consult with your SAP support team or a consultant who specializes in SAP PP or PS modules for further assistance.