Hello, 

I'm trying to simulate a PCS7 Multiproject with SIMIT DEMO V10.1. When I start the simulation with Virtual Controller coupling I get the message "Simulation cannot be opened, Coupling SIMATIC 400(1) caused an error in OPEN" (please see attachment). 

I need help to resolve this issue

Thank you in advance

Hello

Do you have resolved your problem? i have the same issue

Thank you

You need to understand the limitations of SIMIT DEMO mode.

Reference: https://support.industry.siemens.com/cs/mdm/109812085?c=146477744523

Most likely if you have problems launching a simulation in DEMO mode you have violated the limits of DEMO capability and you need to purchase licenses for used features. (SIMIT SP, VC, etc.)