Endogenous $-control operations not allowed

Hello Guys

I am trying to model the following optimization problem but I am getting the following errors:

 52  Endogenous $-control operations not allowed
256  Error(s) in analyzing solve statement. More detail appears
     Below the solve statement above
299  Unexpected end of file

This is the code:

set
j /L1*L6/
k /t1*t24/
j1 /L1*L3/
j2 /L4*L6/


Table OT(j,*)
    p      s     f     r
L1  750    17    24    2
L2  700    15    20    3
L3  600    15    24    2
L4  400    15    24    10
L5  150    1     24    24
L6  150    16    18    3;


Table c(k,*)
      m        n     t     d    u
t1    10.1     1     22    24   1
t2    10.1     2     22    1    1
t3    10.1     3     21    2    1
t4    10.1     4     21    3    1
t5    10.1     5     21    4    1
t6    10.1     6     20    5    1
t7    10.1     7     21    6    0
t8    14.4     8     22    7    0
t9    14.4     9     23    8    0
t10   14.4     10    24    9    0
t11   14.4     11    24    10   0
t12   20.8     12    25    11   0
t13   20.8     13    25    12   0
t14   20.8     14    25    13   0
t15   20.8     15    24    14   0
t16   20.8     16    23    15   1
t17   20.8     17    23    16   1
t18   14.4     18    22    17   1
t19   14.4     19    21    18   1
t20   10.1     20    21    19   1
t21   10.1     21    21    20   1
t22   10.1     22    20    21   1
t23   10.1     23    20    22   1
t24   10.1     24    20    23   1;




variable f, T(k), p(k);

T.up(k)=26;
T.lo(k)=19;

binary variable u(j,k);

equations eq1, eq2, eq3, eq4, eq5, eq6;
eq1(j) .. sum(k,u(j,k))=e= OT(j,'r');
eq2(j,k) $(c(k,'n') > OT(j,'f')) .. u(j,k) =e= 0 ;
eq3(j,k)  $(c(k,'n') < OT(j,'s')) .. u(j,k) =e= 0;

eq4(k) $(T(k) < c(k,'t')) .. T(k) =e= 0.08*T(k-1) + (1-0.08)*(c(k,'t')-0.05*p(k)/0.026);
eq5(k) $(T(k) > c(k,'t')) .. T(k) =e= 0.08*T(k-1) + (1-0.08)*(c(k,'t')+0.05*p(k)/0.026);

eq6 .. f =e= sum((j,k),c(k,'m')*OT(j,'p')*u(j,k)) + sum(k,c(k,'m')*p(k)*c(k,'u'));

model base /all/;
Solve base min f using MINLP

Hi,

The post How do I formulate logical expressions in equations? from the FAQ may be helpful:

I hope this helps!

Fred

Thanks Fred for your reply and help.