liqiwen wrote
i create the RAM64 like this :
Mux8Way16(a=r11,b=r22,c=r33,d=r44,e=r55,f=r66,g=r77,h=r88,sel=adress[3..5],out=out);
"adress" is missing a "d" so the simulator thinks it's an internal signal.
Assuming that this is the solution, please edit your post to remove the source code.
--Mark