diff --git a/setup.py b/setup.py
index e2cbd20..db07706 100644
--- a/setup.py
+++ b/setup.py
@@ -56,7 +56,7 @@ def run(self):
 
 setup(
     name="up_fmap",
-    version="0.0.9",
+    version="0.0.10",
     description="up_fmap",
     author="Alejandro Torreño, Eva Onaindia and Oscar Sapena",
     author_email="onaindia@dsic.upv.es",
diff --git a/up_fmap/fmap_planner.py b/up_fmap/fmap_planner.py
index 5280187..852ae0f 100644
--- a/up_fmap/fmap_planner.py
+++ b/up_fmap/fmap_planner.py
@@ -123,6 +123,8 @@ def _solve(
         assert isinstance(problem, up.model.Problem) or isinstance(
             problem, up.model.multi_agent.MultiAgentProblem
         )
+        if heuristic is not None:
+            raise up.exceptions.UPUsageError('Custom heuristic is not supported!')
         plan = None
         logs: List["up.engines.results.LogMessage"] = []
         with tempfile.TemporaryDirectory() as tempdir:
@@ -134,8 +136,6 @@ def _solve(
             w.write_ma_domain(domain_filename)
             w.write_ma_problem(problem_filename)
             cmd = self._get_cmd_ma(problem, domain_filename, problem_filename)
-            if heuristic is not None:
-                cmd += ["-h", heuristic]
             if output_stream is None:
                 # If we do not have an output stream to write to, we simply call
                 # a subprocess and retrieve the final output and error with communicate