Invalid format or parse error for algebraic rule ''''. An algebraic rule is defined as f(x) = 0 and specifie

[shariari]

Invalid format or parse error for algebraic rule ''''. An algebraic rule is defined as
f(x) = 0 and specified as f(x). For example, the constraint s1 = s2 + s3 can be specified as
the algebraic rule s2 + s3 - s1.