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Wincc 7.0 to 8.1 project migration

3/14/2025 1:27 PM	Rate (0)
joao vitor_de res... Joined: 3/14/2025 Last visit: 4/9/2025 Posts: 2 Rating: (0)	Hello, I'm having problems migrating projects from Wincc v7.0 SP2 to Wincc v8.1. We managed to migrate to v7.4, but when migrating to v8.1, the project does not run the runtime. And for the migration to v7.3SE, to then migrate to v8.1, it is also giving an error when migrating first to v7.3SE. Can someone help me? Thank you.

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3/14/2025 2:52 PM	Rate (0)
Pau97 Joined: 7/27/2023 Last visit: 8/28/2025 Posts: 131 Rating: (9)	Hi! The migration must be done from WinCC V7.0 (preferably last SP and update) to WinCC V7.3 SE. Then to WinCC V8.1. - Migration of WinCC Projects from V4 to V8: https://support.industry.siemens.com/cs/af/en/view/44029132 If you have tried this and still get an error, could you share a screenshot of the error?
	Last edited by: Wit_Moderator at: 03/14/2025 15:01:39 Link optimized
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3/19/2025 10:33 AM	Rate (0)
Murof Platinum Expert Joined: 8/3/2009 Last visit: 9/4/2025 Posts: 16343 Rating: (1931)	Hello joao vitor_de res... WinCC V7.2 could also be used as intermediate. The important sptep is that since V7.2 WinCC can work with Unicode. But Siemens suggests V7.3 SE because of stability and improvements in migration since V7.2. If you cannot get it work you can also try to open a Service Request at Siemens Support, perhaps the project has some kind of damage... I would try to do a Save As with the Project duplicator in the original version and then try to perform the migration again Bye Murof
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