Hi there!

I'm trying to simulate a S7-1500 CPU using PLCSIM V20, but the instance doesn't fully start and I get a Instance has found an unexpected error. It allows me to restablish the instance to an un configured state.

When I start the simulation directly from TIA Portal using the Start Simulation button it happens the same. The instance is created but never starts, giving the same error and not allowing to download the project.

WinCC RT V20 is installed, and I already tried uninstalling and installing again PLCSIM, but problem persists.

Any guess on what can I try next?
Thanks in advance!

PS: some of the attached files are in spanish but the error is visible.
 

which windows version do you use?

Windows 11 pro 23H2

RRBB

Windows 11 pro 23H2

It is my opinion that you should contact [Link: Siemens Support].

But first make sure that you have the newest updates loaded for PLCSIM (and Step7 / Wincc ++). Update ALM and TIA Administrator also -- though not specifically for solving this case. Do let us know the results of your query.