VMware tip – Protocol error from VMX

Small tip, big victory. I have weekly snapshots and clones that are scheduled through vCenter. Suddenly one of the clone tasks stopped working and threw this error:

A General System error occurred: Protocol error from VMX.

Hmmm…that’s odd. It’s run fine up to now right? Luckily the fix couldn’t be too much simpler than this.

SOLUTION: Restart the VMware Tools service in the guest machine and restart the task

et voila!


  1. Thanks so much! This works for me. I have this error while using VEEAM to backup a vm.

  2. I had a similar problem, and I have searched the internet for a solution, but couldn’t find a proper solution, it kept failing, until I came a cross this tip, tested it and it worked like a charm.
    Thanks alot, this was really helpfull

  3. Excelente… me tomo semanas encontrar una solucion hasta que llegue aca… me funciona de maravillas..

    Muchas Gracias.

  4. You really saved my day.. thanks a lot for your tip. it worked like miracle for me.. Excellent..

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