what is the problem with this program. only a short program!

[Altera_Forum]

always @ (posedge clk or negedge rst_n or posedge alarm) 

if(!rst_n || alarm) cnt_s <= 7'b0;   else if (cnt_s == 7'd60 ) begin  cnt_m <= cnt_m + 1 ;   cnt_s <= 7'b0 ;  end   error : Error (10028): Can't resolve multiple constant drivers for net "cnt_m[3]" at timeinterrupt.v(42)

[Altera_Forum]

Is there any othere code in the program where the cnt_m writed? I think the problem is that you change the cnt_m value in different always blocks.

[Altera_Forum]

yes ... thanks for your answer...  

i have used it in another always blocks

[Altera_Forum]

You're welcome ;)