Infeasibility in equation 2 and 8.

GAMS
1

Here is the problem.
Equation 2 and 8 contains constant values and as far as I know solver checks for infeasibility by setting all variables to 0, so final equation looks like 0=e=70,50,etc.

Eq2(i,n)…
S(i,n)-B(i,n) =e=(s0(i)-b0(i))(ORD(n)=1) + (S(i,n-1)-B(i,n-1))(ORD(n)>1)+P(i,n)-zeta(i,n) ;

Eq8(j,n)(not mn(j,n)).. sum(f Fj(f, j),
sum(ff $(Fj(ff,j) and (ord(ff) ne ord(f))),
X(f,ff,j,n))) + 1 =e= sum(f$Fj(f,j),Y_f(f,j,n));
where X,Y_f,S,B are variables and s0,b0, zeta are parameters with values of 0,0,not 0.
Basically, it looks like that VAR1+VAR2+PARAMETER=e=VARIABLE

I just can’t come up with the way how I should put conditions for infeasibility to disappear or reformulate it so the problem would remain MIP.

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2

Under reformulate, I mean to change “1” from eq8 for ex.

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ex1.gms (10.2 KB)

3

Thanks rcvd
On Nov 26, 2014, at 6:26 PM, rotarov@nu.edu.kz wrote:

Under reformulate, I mean to change “1” from eq8 for ex.

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4

What rcvd stands for?

On Thursday, November 27, 2014 1:55:56 AM UTC+6, Miriam Omolo wrote:

Thanks rcvd
On Nov 26, 2014, at 6:26 PM, rot…@nu.edu.kz wrote:

Under reformulate, I mean to change "1" from eq8 for ex.

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