Hi,

I also encounter this problem.
After changing the device version from 17 to 18, I can't run the simulation anymore.
I get the error message "An incorrect runtime version is installed. The installed runtime cannot process the project. Install the runtime manually on the target device"

I installed "WinCC Unified RT PC V18 Sim and Trial" but no result.
I'm using TIA V18 upd1.

Any suggestions?  

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Split from TIP – simulator installation for WinCC Unified V18 .

You need to be carefull with the image version.

If you use the Version 18.0.0.1 in the TIA Portal you need to install Update 1 for the simulation.

Maybe this causes your Problems.

Greetings
ZickZackTIA