How To Fix UR165 - Delta upgrades are only possible with active realignment run

UR165 - Overview

• Message type: E = Error

• Message class: UR -

• Message number: 165

• Message text: Delta upgrades are only possible with active realignment run

Self-Explanatory Message

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UR165 - Details

• The SAP error message UR165 indicates that a delta upgrade cannot be performed because there is no active realignment run. This error typically occurs in the context of SAP systems that utilize the Upgrade Manager (SUM) for performing upgrades, particularly when dealing with the Software Update Manager (SUM) and the Maintenance Planner.
  
  Cause:
  The error arises when:
  
  A delta upgrade is attempted without having an active realignment run.
  The system is not in the correct state to perform the delta upgrade, which requires that the previous upgrade or maintenance activities have been properly aligned and completed.
  
  
  Solution:
  To resolve the UR165 error, follow these steps:
  
  
  Check Realignment Status: Ensure that a realignment run has been executed successfully. You can check the status of the realignment in the SUM tool.
  
  
  Start a Realignment Run: If there is no active realignment run, you need to initiate one. This can typically be done through the SUM tool:
  
  Open the Software Update Manager.
  Navigate