How to pass integer value?

Hi,

I have a question of passing an integer value between two CSP problems.

I am using two FD programs: one gets a shreshold; the other uses the
threshold to solve a CSP problem:

======================================================
req1(LD1,LD2,Thrsd):-
LD1 = [A,B,C,D],
LD2 = [E,F,G],
....
A - F #=< Thrsd,
....
fd_labeling(LD1),
fd_labeling(LD2).
-----------------------------------------------------------------------------------------------

check(LD1,LD2) :-
LD1 = [X,Y,Z],
LD2 = [M,N,L].
....
N*2 - M//4 #>= Thrsd,
....
fd_labeling(LD1),
fd_labeling(LD2).

======================================================
I use fd_minimize(Thresd) to find the threshold, then check if the second
CSP has
solution using this threshold.

Now my question is how to pass the shreshold from one to another. I did
not find such situation in FD examples. Can I use global vareiables? Any
link to it?

Is there any option other than fd_minimize(Var) I can use to find that
threshold?

Thanks
Xiaohua

*************************************************************************
Xiaohua Kong                    __ O_     Off. : (514)398-3937
Ph.D. Candidate                   // \    Fax  : (514)636-8029     
Microelectronics And             //          
Computer System Laboratory     O /        
Dept. of ECE                   ------     Email: [email protected]    
McGill University, Montreal    ----                  
*************************************************************************