We ran into a subtle issue with the En-ROADS model and the latest SDE where sde would fail in the case where a subscripted variable is only partially defined in the mdl file. For example: Constant ...

Abstract: The conventional axiomatic definitions are given for multiple assignment to simple variables and for assignment to a single subscripted variable, along with examples to illustrate their use.

The long integer, i, is a pointer to either the ith handle to an external disk file of extended reals, matfile^^ [i], or to the ith handle to a singly subscripted array of extended reals, ...

When an array variable with separated dimensions occurs on the RHS, we must expand the simple var name reference into a list of subscripted refIds over all the separated indices. This comes up when ...