diff --git a/unified_planning/io/pddl_reader.py b/unified_planning/io/pddl_reader.py
index b0ef9b095..62ef08aa2 100644
--- a/unified_planning/io/pddl_reader.py
+++ b/unified_planning/io/pddl_reader.py
@@ -1264,12 +1264,12 @@ def declare_type(
                     )
                 for p in g.value[0]:
                     a_params[p] = t
-            act = up.model.Process(n, a_params, self._env)
+            proc = up.model.Process(n, a_params, self._env)
             if "pre" in a:
-                act.add_precondition(
+                proc.add_precondition(
                     self._parse_exp(
                         problem,
-                        act,
+                        proc,
                         types_map,
                         {},
                         CustomParseResults(a["pre"][0]),
@@ -1279,12 +1279,12 @@ def declare_type(
             if "eff" in a:
                 self._add_effect(
                     problem,
-                    act,
+                    proc,
                     types_map,
                     CustomParseResults(a["eff"][0]),
                     domain_str,
                 )
-            problem.add_action(act)
+            problem.add_action(proc)
 
         for a in domain_res.get("events", []):
             n = a["name"]
@@ -1305,12 +1305,12 @@ def declare_type(
                     )
                 for p in g.value[0]:
                     a_params[p] = t
-            act = up.model.Event(n, a_params, self._env)
+            evt = up.model.Event(n, a_params, self._env)
             if "pre" in a:
-                act.add_precondition(
+                evt.add_precondition(
                     self._parse_exp(
                         problem,
-                        act,
+                        evt,
                         types_map,
                         {},
                         CustomParseResults(a["pre"][0]),
@@ -1320,12 +1320,12 @@ def declare_type(
             if "eff" in a:
                 self._add_effect(
                     problem,
-                    act,
+                    evt,
                     types_map,
                     CustomParseResults(a["eff"][0]),
                     domain_str,
                 )
-            problem.add_action(act)
+            problem.add_action(evt)
 
         for a in domain_res.get("actions", []):
             n = a["name"]
diff --git a/unified_planning/model/action.py b/unified_planning/model/action.py
index ac9aa2a06..0d76fbaf7 100644
--- a/unified_planning/model/action.py
+++ b/unified_planning/model/action.py
@@ -956,9 +956,6 @@ def add_derivative(
             )
         )
 
-    def __repr__(self) -> str:
-        action_str = InstantaneousAction.__repr__(self)
-        return action_str.replace("action", "process")
 
 
 class Event(InstantaneousAction):
diff --git a/unified_planning/model/problem.py b/unified_planning/model/problem.py
index f858152e1..b174ee32f 100644
--- a/unified_planning/model/problem.py
+++ b/unified_planning/model/problem.py
@@ -116,10 +116,6 @@ def __repr__(self) -> str:
         s.append("]\n\n")
         s.append("actions = [\n")
         s.extend(map(custom_str, self.actions))
-        s.append("processes = [\n")
-        s.extend(map(custom_str, self.processes))
-        s.append("events = [\n")
-        s.extend(map(custom_str, self.events))
         s.append("]\n\n")
         if len(self.user_types) > 0:
             s.append("objects = [\n")