Problem ALTPLL MegaWizzard in 25.1 - Problem ALTPLL MegaWizzard in 25.1 Hello to all, today, I upgraded Quartus to version 25.1 (Lite Edition). Afterwards, I tried to upgrade the IP components. When starting MegaWizard ALTPLL, a confused dialog box appears . (see attached screenshot) It's not possible to use it at all. When I start MegaWizard for the second time, the error message “Failed to launch MegaWizard Plug-In Manager: ALTPLL” appears. My environment: - Quartus Prime version 25.1std.0 Build 1129 10/21/2025 SC Lite Edition - Windows 11 Pro version 25H2 Is there a way to fix this? Thank you in advance. Helmut Replies: Re: Problem ALTPLL MegaWizzard in 25.1 Hi FvM, ah okay, thank you. I had looked for it, but couldn't find anything like that. For whatever reason. Thank you very much. Okay, then I guess I can close this request. Replies: Re: Problem ALTPLL MegaWizzard in 25.1 Hi Helmut, known bug, see https://community.altera.com/discussions/ip-and-transceiver/alt-pll-gui-messded-up-on-invocation/337656