How To Fix AH902 - Intervals must not overlap

SAP Error Message - Details

• Message type: E = Error

• Message class: AH - IS-U billing (master data)

• Message number: 902

• Message text: Intervals must not overlap

What causes this issue?

The intervals for keys TypEKV = &V1& and ArtEKV = &V2& overlap.
<LS>Example:</>
<NP>TypEKV ArtEKV LowLimit UppLimit Months</>
<NP>0001 0001 25 60 1</>
<NP>0001 0001 55 70 2</>
In this example, the intervals [25,60] and [55,70] overlap. The system
cannot find a clear allocation to the number of months.
<NP>&SYSTEM_RESPONSE&</>

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

How to fix this error?

Maintain the intervals so that they do not overlap.

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message AH902 - Intervals must not overlap ?

  The SAP error message AH902, which states "Intervals must not overlap," typically occurs in the context of scheduling or planning activities within SAP, such as in the areas of project management, production planning, or resource allocation. This error indicates that there are overlapping time intervals for the same resource or activity, which is not allowed in the system.
  Cause:
  
  Overlapping Time Periods: The most common cause of this error is that two or more activities or tasks are scheduled to occur at the same time for the same resource (e.g., a machine, employee, or project).
  Incorrect Data Entry: Manual entry errors when defining time intervals for tasks or resources can lead to overlaps.
  Configuration Issues: In some cases, the configuration settings for scheduling or resource management may not be set up correctly, leading to conflicts.
  Changes in Scheduling: If changes are made to the schedule (e.g., rescheduling a task), it may inadvertently create overlaps with existing tasks.
  
  Solution:
  
  Review Scheduled Activities: Check the scheduled activities or tasks for the resource in question. Look for any overlapping time intervals and adjust them accordingly.
  Adjust Time Intervals: Modify the start and end times of the conflicting activities to ensure that they do not overlap. This may involve rescheduling tasks or reallocating resources.
  Use Planning Tools: Utilize SAP planning tools or reports to visualize the schedule and identify overlaps more easily. Tools like Gantt charts can be helpful.
  Data Validation: Implement data validation checks to prevent overlapping intervals from being saved in the future.
  Consult Documentation: Refer to SAP documentation or help resources for specific guidelines on managing schedules and resources to avoid this error.
  
  Related Information:
  
  Transaction Codes: Depending on the module you are working in, you may use different transaction codes to view or edit schedules (e.g., CJ20N for project management, CM21 for capacity planning).
  SAP Notes: Check SAP Notes for any known issues or patches related to scheduling and resource management that may address this error.
  User Roles and Permissions: Ensure that users have the appropriate roles and permissions to make changes to schedules, as restrictions may lead to errors when trying to resolve overlaps.
  
  By following these steps, you should be able to identify and resolve the cause of the AH902 error in SAP.