constants have to be defined in an appropriate (acyclic) order: one can only use a constant (on the right hand side to define another constant) which has previously defined, e.g., const D=3 has to come before D1=D in the totally ordered list of constant definitions.
when developing a model, the right order might not be known in advance; so a re-ordering of the constant definitions may be required, which is not possible so far. #
constants have to be defined in an appropriate (acyclic) order: one can only use a constant (on the right hand side to define another constant) which has previously defined, e.g., const D=3 has to come before D1=D in the totally ordered list of constant definitions. when developing a model, the right order might not be known in advance; so a re-ordering of the constant definitions may be required, which is not possible so far. #