I could not find my mistake. Please, help me

obj… z=e=sum((i,j,s),FC(i,j,s)*Y(i,j,s))+sum((i,j,s),v(i,j,s)*P(i,j,s))+sum((i,s),cp(i,s)*CO(i,s))+sum((i,s,c),t(i,s,c)*supply(i,s,c))+sum((i,s),h(i,s)*inventory(i,s))+sum((i,s),ss(i,s)*I_D(i,s))+sum((i,c),m(i,c)*I_S(i,c))+sum((i,s),BC(i,s)*B(i,s))

**** $140

**** 140 Unknown symbol

There is a 140 error at the z part…