Dear all,

I'm having problems with the following equations below. What I want is that if Jpma(f,t,m) is larger than 0, then the values for costbiorefinery(f,t,m) should be calculated. If Jpma(f,t,m) is equal to 0, then Costbiorefinery shouldn't be calculated for a set. However, with the current coding, kbiorefineryb(f,t) is calculated without considerations for the values of Jpma(f,t,m). How do i exclude these values? Please help me. Thank you.

Table Cfba(f,t) Conversion of feed f to prod p main

enzymatic anaerobic aquatic ssf

bark 0.1079 0 0 0.000038937

pith 0.1394 0 0 0.001485

wastewater 0 0.0036671 0.01495 0;

Table kbiorefinerya(f,t) Cost of Conversion of feed f to prod p (ax+b)

enzymatic anaerobic aquatic ssf

bark 661.48 0 0 2E9

pith 4889.1 0 0 7E7

wastewater 0 15341 18051 0;

Table kbiorefineryb(f,t) Cost of Conversion of feed f to prod p (ax+b)

enzymatic anaerobic aquatic ssf

bark 2E7 0 0 5E7

pith 2E7 0 0 7E7

wastewater 0 2E7 1E7 0;

Table exist(f,t)

enzymatic anaerobic aquatic ssf

bark 1 0 0 1

pith 1 0 0 1

wastewater 0 1 1 0;

E3a(f,t,m) .. Jpma(f,t,m) =e= (Jftm(f,t,m)*Cfba(f,t)) $ (exist(f,t)=1) ;

E91(f,t,m) .. Costbiorefinery(f,t,m) =e= (kbiorefinerya(f,t)*Jpma(f,t,m)+kbiorefineryb(f,t));