ERROR:MapLib:973 - Tri-state buffers are not supported in this architecture.

勤劳的小男人

在进行map是出现如下错误：ERROR:MapLib:973 - Tri-state buffers are not supported in this architecture.
   Block Is1/Im2/Ibmx/I73/I5_16_/Y_A must be removed from the design.


主要原因就是处在这个TBUFX上
module TBUFX12 ( Y, A, OE );
output Y;
input A, OE;

  assign Y = OE ? A : 1'bz;
//  bufif1 I0(Y, A, OE);
endmodule

但是不知道到底错在哪里？求大神帮忙！！！！！！！！