I have Nexys4 FPGA , it has a system clock of 100mhz, can it generate 200mhz clock, when using Clocking Wizard IP?

Yes if you set up the Clocking wizard correctly it can, just set the clock out to 200Mhzit is really quite simple to do

Screenshot 2022-03-05 103919.png

I am getting this error. 

Please help.

I am currently trying to run Tri Mode Ethernet IP, for that i need a clock of 200MHZ(+ve and -ve, or you can say 200mhz clock 180 degree out of phase) from nexys4 fpga 

Are you trying to connect an IBUFDS at the output of the clock wizard? If you send a clock diagram of what you are trying to do or a snippet of the code that could be helpful.