Quartus9.1错误10500怎么解决

[caicai51]

p1:process(reset,set_time)
begin
case set_time is
when "00"=>load<='0';load1<='0';load2<='0';
en_s<='1';en_m<=co_s;en_h<=co_m;
when "01"=>load<='1';load1<='0';load2<='0';
en_s<='0';en_m<='0';en_h<='0';
when "10"=>load<='0';load1<='1';load2<='0';
en_s<='0';en_m<='0';en_h<='0';
when "11"=>load<='0';load1<='0';load2<='1';
en_s<='0';en_m<='0';en_h<='0';
when others=>load<='0';load1<='0';load2<='0';
en_s<='1';en_m<=co_s;en_h<=co_m;
end case;
end process p1;
us:counter60 port map(reset,clk_1s,en_s,load0,set_date,s_out,co_s);
um:counter60 port map(reset,clk_1s,en_m,load1,set_date,m_out,co_m);
uh:counter60 port map(reset,clk_1s,en_h,load0,set_date,h_out,co_h);
请问大家quartus9.1为什么这个程序为什么会出现错误10500，怎么解决呢