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Issues activating migrating project from WinCC 7.3 to WinCC 8.1

9/9/2025 11:26 AM	Rate (0)
AutoGen_6248726 Joined: 12/8/2024 Last visit: 9/10/2025 Posts: 2 Rating: (0)	Hi, I have migrated a project from WinCC 7.3 to WinCC 8.1. Facing the issue where after weeks time all the channel drivers and Local PC in System Info is lost and project has to be deactivated, complete system restart and then start back the project again. Can anyone help how this can be resolved? ------------------------------------------------------------------------------------------ Split from Issues activating project after installing V8.1 Update 3.
	Last edited by: Moderator_Lan at: 09/09/2025 13:00:13 New subject after splitting
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9/10/2025 11:00 AM	Rate (0)
Murof Platinum Expert Joined: 8/3/2009 Last visit: 9/12/2025 Posts: 16409 Rating: (1935)	Hello AutoGen_6248726 so you have migrated a V7.3 Projekt to V8.1 (which Upd?) and after running in V8.1 a few weeks all communication drivers are gone? this sounds very strange... do you have made any updates on the system in the meanwhile? Is the runtime crashed or even shutdown accidently? you can try to analyse the diagnosefolder of WinCC of the RT Station or also create a service request at Siemens Technical Suppport for troubleshooting help Bye Murof
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