Why does this error appear?

I used Nexys A7 board.in fpga in the loop.

I appreciate any help.

[Peter O]

Can you tell us a little more about what target you're trying to run your simulation code on? It sounds like it might not be configured correctly.

[amenah mwuafaq]

I am using fpga in the loop to implemeintation processing video on fpga . I use JTAG USB port