diff --git a/capsul/database/__init__.py b/capsul/database/__init__.py
index 1da57476..9ecaa25d 100644
--- a/capsul/database/__init__.py
+++ b/capsul/database/__init__.py
@@ -271,6 +271,9 @@ def job_parameters_from_values(self, job_dict, parameters_values):
                 result[k] = parameters_values[i]
         return result
 
+    def successful_node_paths(self, engine_id, execution_id):
+        raise NotImplementedError
+
     def print_execution_report(self, report, file=sys.stdout):
         print(
             "====================\n" "| Execution report |\n" "====================\n",
@@ -410,6 +413,8 @@ def update_executable(self, engine_id, execution_id, executable):
             # pprint(parameters.content)
             while stack:
                 node, parameters = stack.pop(0)
+                if parameters is None:
+                    continue
                 for field in node.user_fields():
                     value = parameters.get(field.name, undefined)
                     value = parameters.no_proxy(value)
@@ -421,7 +426,7 @@ def update_executable(self, engine_id, execution_id, executable):
                         setattr(node, field.name, value)
                 if isinstance(node, Pipeline):
                     stack.extend(
-                        (n, parameters["nodes"][n.name])
+                        (n, parameters["nodes"].get(n.name))
                         for n in node.nodes.values()
                         if n is not node and isinstance(n, Process) and n.activated
                     )
diff --git a/capsul/database/redis.py b/capsul/database/redis.py
index 1a54b950..bf9c464f 100644
--- a/capsul/database/redis.py
+++ b/capsul/database/redis.py
@@ -310,31 +310,6 @@ def _enter(self):
         """
         )
 
-        self._update_workflow_parameters = self.redis.register_script(
-            """
-            local execution_key = KEYS[1]
-
-            local parameters_location = cjson.decode(ARGV[1])
-            local output_parameters = cjson.decode(ARGV[2])
-            local workflow_parameters = cjson.decode(redis.call('hget', execution_key, 'workflow_parameters'))
-
-            local parameters = workflow_parameters['content']
-            for index, value in ipairs(parameters_location) do
-                local i = tonumber(value)
-                if i then
-                    parameters = parameters[i+1]
-                else
-                    parameters = parameters[value]
-                end
-            end
-
-            for k, v in pairs(output_parameters) do
-                workflow_parameters['proxy_values'][parameters[k][2]+1] = v
-            end
-            redis.call('hset', execution_key, 'workflow_parameters', cjson.encode(workflow_parameters))
-            """
-        )
-
         self._dispose = self.redis.register_script(
             """
             local function table_find(array, value)
@@ -808,6 +783,19 @@ def execution_report_json(self, engine_id, execution_id):
 
         return result
 
+    def successful_node_paths(self, engine_id, execution_id):
+        execution_key = f"capsul:{engine_id}:{execution_id}"
+        failed = json.loads(self.redis.hget(execution_key, "done"))
+        for job_uuid in failed:
+            job = json.loads(
+                self.redis.hget(f"capsul:{engine_id}:{execution_id}", f"job:{job_uuid}")
+            )
+            parameters_location = job.get("parameters_location")
+            if parameters_location:
+                result = tuple(i for i in parameters_location if i != "nodes")
+                if result != ("directories_creation",):
+                    yield result
+
     def dispose(self, engine_id, execution_id, bypass_persistence=False):
         keys = [f"capsul:{engine_id}", f"capsul:{engine_id}:{execution_id}"]
         args = [execution_id, int(bool(bypass_persistence))]
diff --git a/capsul/engine/__init__.py b/capsul/engine/__init__.py
index 030ddbb3..49d2ad00 100644
--- a/capsul/engine/__init__.py
+++ b/capsul/engine/__init__.py
@@ -410,6 +410,25 @@ def run(self, executable, timeout=None, print_report=False, debug=False, **kwarg
                 self.dispose(execution_id)
         return status
 
+    def prepare_pipeline_for_retry(self, pipeline, execution_id):
+        """Modify a pipeline given a previous execution to select only the nodes that
+        weren't successful. Running the pipeline after this step will retry the
+        execution of faile jobs. This method adds (or modify if it exists) an unselectd
+        pipeline step called "succesfully_executed" containing all nodes that were
+        succesfully executed.
+        """ ""
+        successful_nodes = []
+        for path in self.database.successful_node_paths(self.engine_id, execution_id):
+            successful_nodes.append(pipeline.node_from_path(path).name)
+        step_field = None
+        if pipeline.field("pipeline_steps"):
+            step_field = pipeline.pipeline_steps.fields("succesfully_executed")
+        if step_field is None:
+            pipeline.add_pipeline_step("succesfully_executed", successful_nodes, False)
+        else:
+            step_field.nodes = successful_nodes
+            setattr(pipeline.pipeline_steps, "succesfully_executed", False)
+
 
 class Workers(Controller):
     def __init__(self, engine_label, engine_config, database):
diff --git a/capsul/pipeline/pipeline.py b/capsul/pipeline/pipeline.py
index a907ffcf..a5f18e65 100644
--- a/capsul/pipeline/pipeline.py
+++ b/capsul/pipeline/pipeline.py
@@ -2449,6 +2449,13 @@ def __setattr__(self, name, value):
             self.dispatch_value(self, name, value)
         return result
 
+    def __setitem__(self, path, value):
+        path = path.split(".")
+        node_path = path[:-1]
+        node = self.node_from_path(node_path)
+        setattr(node, path[-1], value)
+        self.dispatch_value(node, path[-1], value)
+
     def dispatch_value(self, node, name, value):
         """Propagate the value from a pipeline plug through links"""
         # print(f"!dispatch! {node.name}.{name} = {value}")
@@ -2650,6 +2657,15 @@ def import_json(self, json):
             ):
                 self.dispatch_value(node, names[-1], json_value)
 
+    def node_from_path(self, path):
+        node = self
+        for path_item in path:
+            if isinstance(node, ProcessIteration):
+                node = node.process
+            else:
+                node = node.nodes[path_item]
+        return node
+
 
 class CustomPipeline(Pipeline):
     def __init__(self, definition="custom_pipeline", json_executable={}):