Error (10278):Verilog HDL Port Declaration error at led_display.v(9):input port "data_in" cannot be declared with type ""

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Error (10278):Verilog HDL Port Declaration error at led_display.v(9):input port
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Error (10278):Verilog HDL Port Declaration error at led_display.v(9):input port "data_in" cannot be declared with type ""
Error (10278):Verilog HDL Port Declaration error at led_display.v(9):
input port "data_in" cannot be declared with type ""

Error (10278):Verilog HDL Port Declaration error at led_display.v(9):input port "data_in" cannot be declared with type ""
是不是定义了input data_in 又定义了reg data_in?
去掉reg data_in那行代码

Error (10278):Verilog HDL Port Declaration error at led_display.v(9):input port data_in cannot be declared with type object error fatal error Error Port! connection error error是什么意思 Error code error code error-focused On Error Error 500--Internal Server Error error 1310.error writing to Error 500--Internal Server Error 什么是mean error和mean squared error? ERROR during capture ,error code=00000000 ERROR A:19:91 [-1]AR Return Error! AR Return Error!