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```[INFO]: Performing clock tree synthesis...
[INFO]: Looking for the following net(s): clk sram_clk
[INFO]: Running Clock Tree Synthesis...
[ERROR UKN-0000] Error when finding -clk_nets in DB!```
But those definitely exist in my design:
```always @(*) begin                                                                                                                                                
    clk = in_select ? gpio_clk : la_clk;                                                                                                                         
    sram_clk = in_select ? gpio_sram_clk : la_sram_clk; 
...
end```