diff --git a/src/graph_engine.jl b/src/graph_engine.jl
index a8c1d635..1a7ed203 100644
--- a/src/graph_engine.jl
+++ b/src/graph_engine.jl
@@ -1834,9 +1834,15 @@ function prepare_interfaces(model::Model, fform::F, lhs_interface, rhs_interface
 end
 
 function prepare_interfaces(::StaticInterfaces{I}, fform::F, lhs_interface, rhs_interfaces::NamedTuple) where {I, F}
-    if !(length(I) == 1)
+    if length(I) == 0
+        n = "\n"
         error(
-            lazy"Expected only one missing interface, got $I of length $(length(I)) (node $fform with interfaces $(keys(rhs_interfaces)))"
+            lazy"Node '$(fform)' needs to be defined with one unspecified interface.$(n)$(n)Node '$(fform)' is currently specified with all interfaces: $(keys(rhs_interfaces)), but one needs to be left out."
+        )
+    elseif length(I) > 1
+        n = "\n"
+        error(
+            lazy"Node '$(fform)' is defined with too few interfaces (arguments), you need $(length(I)-1) more.$(n)$(n)Currently specified interfaces are: $(keys(rhs_interfaces)). Possible missing interfaces are: $(I), but check the documentation to see the specification options."
         )
     end
     missing_interface = first(I)
diff --git a/test/graph_engine_tests.jl b/test/graph_engine_tests.jl
index a0a06575..71f07075 100644
--- a/test/graph_engine_tests.jl
+++ b/test/graph_engine_tests.jl
@@ -2243,7 +2243,7 @@ end
     in1 = getorcreate!(model, ctx, :in1, nothing)
     in2 = getorcreate!(model, ctx, :in2, nothing)
     out = getorcreate!(model, ctx, :out, nothing)
-    @test_throws "Expected only one missing interface, got () of length 0 (node sum with interfaces (:in, :out))" make_node!(
+    @test_throws "needs to be defined with one unspecified interface" make_node!(
         model, ctx, options, +, out, (in = in1, out = in2)
     )