IEC61850: error starting zenon logic application

IEC61850: error starting zenon logic application

Hi,
I have a problem in Zenon logic project, in specific during launch of the application.
In the project, I configured an IEC61850 Client with many Master/port added in. Under each Master port, I created a ConnectionState variable that monitors communication among RTU (Server 61850) and driver 61850 Client.
Project compilation doesn't return any error.
When I try to download the application, in the Report tab in zenon logic mask minimized in icon tray, I can see following errors:
T5BusExIec850m/QS//ConnectionState: Error adding variable
T5BusExIec850m/QS//ConnectionState: Error adding variable
Opening bus driver 'T5BusExIec850m' for cold resp. warm start failed
Starting application failed
Attached to this post you can find a screenshot about the problem.
Thank
Steven Costantini

This is a migrated post! Originally posted on 26.02.2016 by user steven.costantini. Please be aware that information can be outdated.