ID:13071 The ALT_BIDIR_DIFF or the ALT_BIDIR_BUF primitive instance <name> is used in an illegal configuration

CAUSE: The specified instance of the ALT_BIDIR_DIFF or the ALT_BIDIR_BUF I/O primitive is used in an illegal configuration. The ports of the primitive must be connected as follows: ALT_BIDIR_DIFF ALT_BIDIR_BUF Note that all the ports should be directly connected in the specified way. This error can also occur if there is any inversion in between. This error can also occur if the padio port of the altddio_bidir megafunction has multiple fanouts. The port must have a single fanout to the primitive. Example usage:

module ddio_top 
(aset, 
	combout, 
	datain_h, 
	datain_l, 
	inclock, 
	sclr, 
	oe, 
	outclock, 
	bidir1, 
	bidir2 
); 
	input   aset; 
	input sclr; 
	output   combout; 
	input   datain_h; 
	input    datain_l; 
	input   inclock; 
	input   oe; 
	input   outclock; 
	inout bidir1; 
	inout bidir2; 
		wire tmp_oe; 
	wire tmp_padio; 
		myddio_bidir sample_ddio(.aset(aset), 
	.combout(combout), 
	.datain_h (datain_h), 
	.datain_l(datain_l), 
	.inclock(inclock), 
	.oe(oe), 
	.outclock(outclock), 
	.padio(tmp_padio), 
	.oe_out(tmp_oe), 
	.sclr(sclr)); 
	alt_bidir_diff my_bidir (.bidirin(tmp_padio), .oe (tmp_oe), .io(bidir1), .iobar(bidir2)); 
endmodule