Import InvalidSystemException

YingboMa · YingboMa · commit f3e128368c34 · 2021-04-10T22:20:44.000-04:00
diff --git a/src/structural_transformation/StructuralTransformations.jl b/src/structural_transformation/StructuralTransformations.jl
@@ -16,7 +16,7 @@ using ModelingToolkit: ODESystem, var_from_nested_derivative, Differential,
                        states, equations, vars, Symbolic, diff2term, value,
                        operation, arguments, Sym, Term, simplify, solve_for,
                        isdiffeq, isdifferential,
-                       get_structure, defaults
+                       get_structure, defaults, InvalidSystemException
 
 using ModelingToolkit.BipartiteGraphs
 using ModelingToolkit.SystemStructures
