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WinCC 7.5 Downgrade Service Packs

1/17/2025 9:39 AM	Rate (0)
gm2410 Member Joined: 10/4/2018 Last visit: 3/5/2025 Posts: 1 Rating: (0)	Hallo, ist es möglich, Änderungen in einem WinCC 7.5-SP2-Projekt zu machen und dieses Projekt später auf einem Server mit WinCC 7.5 ohne Service Packs zu verwenden? Oder ist es zwingend erforderlich, die Änderungen auf einem System mit WinCC 7.5 ohne Service Packs zu machen?

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1/17/2025 9:52 AM	Rate (0)
Cookie_M0nster Bronze Member Joined: 10/16/2020 Last visit: 9/8/2025 Posts: 146 Rating: (13)	Hi! It is mandatory to make the changes on a system with WinCC 7.5 without service packs in order to guarantee the correct working of the system. BR
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1/20/2025 8:53 AM	Rate (0)
ElonksuM_SN_BN Regular Expert Joined: 5/6/2022 Last visit: 9/15/2025 Posts: 589 Rating: (123)	Hi gm2410, In the end, if you make the changes in a V7.5 SP2 software and then you intend to work with a WinCC with V7.5 version, it will not be possible because having modified the project with a higher version you will have made a migration of the project and therefore, you will not be able to work with it with a lower version. Best regards!
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This contribution was helpful to 1 thankful Users Alex.P

1/23/2025 8:35 AM	Rate (0)
Murof Platinum Expert Joined: 8/3/2009 Last visit: 9/17/2025 Posts: 16437 Rating: (1935)	Hello gm2410 I would say that even the update must be the same on ES and RT to prevent errors or unpredictable behaviour of your WinCC System. (It is possible to use different Updates but sometimes some points have been fixed or improved and could differ from Upd to Upd.) I would invest in installing a VM or ES System with exact the same Version of the RT System to avoid issues. Bye Murof
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