ID:13040 bidirectional pin "<name>" has no driver
CAUSE: The specified bidirectional pin has no driver - that is, it is behaving as an input pin.
For example, the following Verilog design gives this warning for the pin
bidir
: module test2 (inout bidir, output out);
assign out = bidir;
endmodule
ACTION: Declare the pin as an input pin instead of a bidirectional pin.