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When my SDC file is read while compiling for a Stratix 10 device, the set_clock_groups command is failing. The failure occurs because at the point in time that the SDC file is read, the tool does not know about derived clocks. My SDC file has the derive_pll_clocks included, but I get a statement "The derive_pll_clocks command is not supported in this family". So apparently I should not have to call this command. But the clocks that are referenced in my set_clock_groups command are not valid at the time the SDC file is read. However, they are valid later. For instance, if I go into TimeQuest I get the same failure initially with the set_clock_groups. If I run report_clocks the clock names that I used are valid. If I re-read the SDC file within TimeQuest the set_clock_groups command does not fail. So it appears that set_clock_groups has to occur after some later step in the SDC read process.
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what stops you from directly setting clk group to the pll outputs (without using derive pll clocks). You can find the path name from node finder in timequest.
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