How To Fix 14066 - Error; VMC state could not be changed

SAP Error Message - Details

• Message type: E = Error

• Message class: 14 - Task handler messages

• Message number: 066

• Message text: Error; VMC state could not be changed

Self-Explanatory Message

Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of messages in the SAP system have a message text, however this is frequently insufficient to comprehend or resolve the problem.

To make things easier, more detailed information is frequently added to describe the issue, how to fix it, and the necessary steps or configuration modifications.

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Smart SAP Assistant

• What is the cause and solution for SAP error message 14066 - Error; VMC state could not be changed ?

  The SAP error message "14066: VMC state could not be changed" typically relates to issues with the Virtual Machine Controller (VMC) in the context of SAP systems, particularly when dealing with SAP NetWeaver or SAP HANA environments. This error can occur during operations that involve changing the state of a virtual machine, such as starting, stopping, or restarting it.
  Causes:
  
  Insufficient Permissions: The user may not have the necessary permissions to change the state of the virtual machine.
  Resource Constraints: The underlying infrastructure may not have enough resources (CPU, memory, etc.) to perform the requested operation.
  Configuration Issues: There may be misconfigurations in the virtual machine settings or the environment.
  Network Issues: Problems with network connectivity can prevent the VMC from communicating with the necessary components.
  Locked Resources: The virtual machine or its resources may be locked by another process or user, preventing state changes.
  Software Bugs: There may be bugs in the SAP software or the virtualization platform that are causing the issue.
  
  Solutions:
  
  Check Permissions: Ensure that the user has the appropriate permissions to perform the operation on the virtual machine.
  Resource Availability: Verify that there are sufficient resources available on the host machine. If necessary, free up resources or allocate more to the virtual machine.
  Review Configuration: Check the configuration settings of the virtual machine and ensure they are correct. Look for any discrepancies that might prevent state changes.
  Network Connectivity: Ensure that there are no network issues affecting communication between the VMC and other components. Check firewalls, network settings, and connectivity.
  Unlock Resources: If the virtual machine is locked, identify the process or user that is holding the lock and resolve the issue.
  Check Logs: Review the SAP and virtualization platform logs for any additional error messages or warnings that could provide more context about the issue.
  Restart Services: Sometimes, restarting the relevant services or the entire host machine can resolve transient issues.
  Update Software: Ensure that both the SAP software and the virtualization platform are up to date with the latest patches and updates.
  
  Related Information:
  
  SAP Notes: Check SAP Notes for any known issues or patches related to this error message. SAP frequently updates its knowledge base with solutions to common problems.
  Documentation: Refer to the official SAP documentation for guidance on managing virtual machines and troubleshooting related issues.
  Support: If the issue persists, consider reaching out to SAP Support for assistance, providing them with detailed logs and error messages to facilitate troubleshooting.
  
  By following these steps, you should be able to diagnose and resolve the "14066: VMC state could not be changed" error in your SAP environment.