The command is correct. I just tried it and it opened the example as I expected.
From the Release Notes for release R2022b, "Marine Power System Deployment to HIL" is a new example in this release. You're using release R2022a which predates the introduction of this example. That's why you can't open it. You'll need to upgrade to release R2022b (which as I type this is the most recent release) or later (if you're reading this in the future after release R2023a or later releases have been released) to open it.
