This compiles, but does not run

This compiles, i.e.
"./setup install sapporo_light" and "./setup install amuse-ph4" will complete without error.
However, Erwan's script with an additional "print(f"{code.get_nj_max() = }, ")" will yield
"
TypeError: ph4Interface.get_nj_max() takes 0 positional arguments but 1 was given
"

Author: HannoSpreeuw

src/amuse_ph4/interface.cc

@@ -936,3 +936,10 @@ int get_id_of_updated_particle(int index, int * index_of_particle, int * status)
     *status = jd->UpdatedParticles[index].status;
     return 0;
 }
+
+extern "C" int g6_get_nj_max_();
+
+int get_nj_max()
+{
+    return g6_get_nj_max_();
+}

src/amuse_ph4/interface.py

@@ -464,14 +464,10 @@ def recompute_timesteps():
         function.result_type = 'int32'
         return function
 
-    def get_nj_max(self):
-        """
-        Returns the maximum number of particles supported by Sapporo Light.
-        """
+    def get_nj_max():
         function = LegacyFunctionSpecification()
-        return function(
-            returns=int,
-        )
+        function.result_type = 'int32'
+        return function
 
 class ph4(GravitationalDynamics,GravityFieldCode):