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VMware VM backups failing with INTERNAL65535 due to issues with nvram entry in the vmx
VMware VM backups failing with INTERNAL65535 due to issues with nvram entry in the vmx
Updated over a week ago

Problem description

VMware VM backups failing with Error: INTERNAL65535

Cause

VM was converted from Physical to Virtual Machine causing issues with nvram entry in the vmx file.

Traceback

[2024-02-18 23:03:08,597] [INFO] VMX fpath: [Unity_Datastore02] BTC-SVR-BLACKHOLE/BTC-SVR-BLACKHOLE.vmx
[2024-02-18 23:03:08,598] [ERROR] Error <type 'exceptions.TypeError'>:cannot concatenate 'str' and 'NoneType' objects. Traceback -Traceback (most recent call last):
File "agents/vmware/vmwareAgent.py", line 1766, in do_retry
File "agents/vmware/vmwareAgent.py", line 1952, in get_nvram_from_datastore
File "agents/vmware/vmwareAgent.py", line 1939, in __get_nvram_path
TypeError: cannot concatenate 'str' and 'NoneType' objects

Resolution

Re-register the VM using the vmx file:

  1. Locate the VMX file of the affected VM.

  2. Open vCenter and navigate to the relevant datacenter and host.

  3. Right-click on the host and select "Browse Datastore."

  4. Upload the VMX file to the datastore.

  5. Right-click on the uploaded VMX file and select "Register VM."

If the issue persists, follow the workaround:

Workaround:Re-creating the VM using the existing disk:

  1. Shutdown the affected VM.

  2. Verify the absence of a generic nvram file.

  3. Add the following nvram parameter to the VM configuration file (VMX): nvram = "<vm name>.nvram"

  4. Power on the VM.

  5. Run a backup for the system to ensure data integrity.

Alternate Procedure for Workaround:

  1. Shutdown the VM.

  2. Confirm the absence of a generic nvram file.

  3. Edit the VMX file and add the nvram parameter: nvram = "<vm name>.nvram"

  4. Power on the VM.

  5. Perform a system backup to safeguard your data.


Additional Notes:

  • Always ensure that you have a recent backup before making any changes to the VM configuration.

  • The workaround provides an alternative method for resolving registration issues by recreating the VM using the existing disk.

Related keywords: Backups are failing with error INTERNAL65535. issues with nvram entry in the vmx, resolve backup failures INTERNAL65535, VMware vm INTERNAL65535

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