diff --git a/Dockerfile b/Dockerfile
index c2e531d..012ee82 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,7 +1,7 @@
 # Base OS
 FROM python:3.9-slim-buster
 
-ARG VERSION="0.0.5"
+ARG VERSION="0.0.6"
 ARG SIMULATOR_VERSION=8.0
 
 # metadata
diff --git a/biosimulators_xpp/_version.py b/biosimulators_xpp/_version.py
index eead319..fa9c4ec 100644
--- a/biosimulators_xpp/_version.py
+++ b/biosimulators_xpp/_version.py
@@ -1 +1 @@
-__version__ = '0.0.5'
+__version__ = '0.0.6'
diff --git a/biosimulators_xpp/core.py b/biosimulators_xpp/core.py
index 74d1a19..f156875 100644
--- a/biosimulators_xpp/core.py
+++ b/biosimulators_xpp/core.py
@@ -97,7 +97,7 @@ def exec_sed_task(task, variables, preprocessed_task=None, log=None, config=None
     Args:
         task (:obj:`Task`): task
         variables (:obj:`list` of :obj:`Variable`): variables that should be recorded
-        preprocessed_task (:obj:`object`, optional): preprocessed information about the task, including possible
+        preprocessed_task (:obj:`dict`, optional): preprocessed information about the task, including possible
             model changes and variables. This can be used to avoid repeatedly executing the same initialization
             for repeated calls to this method.
         log (:obj:`TaskLog`, optional): log for the task
@@ -127,36 +127,14 @@ def exec_sed_task(task, variables, preprocessed_task=None, log=None, config=None
     model = task.model
     sim = task.simulation
 
-    if config.VALIDATE_SEDML:
-        raise_errors_warnings(validation.validate_task(task),
-                              error_summary='Task `{}` is invalid.'.format(task.id))
-        raise_errors_warnings(validation.validate_model_language(model.language, ModelLanguage.XPP),
-                              error_summary='Language for model `{}` is not supported.'.format(model.id))
-        raise_errors_warnings(validation.validate_model_change_types(model.changes, (ModelAttributeChange, )),
-                              error_summary='Changes for model `{}` are not supported.'.format(model.id))
-        raise_errors_warnings(*validation.validate_model_changes(model),
-                              error_summary='Changes for model `{}` are invalid.'.format(model.id))
-        raise_errors_warnings(validation.validate_simulation_type(sim, (UniformTimeCourseSimulation, )),
-                              error_summary='{} `{}` is not supported.'.format(sim.__class__.__name__, sim.id))
-        raise_errors_warnings(*validation.validate_simulation(sim),
-                              error_summary='Simulation `{}` is invalid.'.format(sim.id))
-
-    if config.VALIDATE_SEDML_MODELS:
-        raise_errors_warnings(*validation.validate_model(model, [], working_dir='.'),
-                              error_summary='Model `{}` is invalid.'.format(model.id),
-                              warning_summary='Model `{}` may be invalid.'.format(model.id))
-
     # read model
-    _, _, xpp_sim = validate_model(model.source)
-
-    # validate observables
-    validate_variables(xpp_sim, variables)
+    xpp_sim = preprocessed_task['xpp_simulation']
 
     # model changes
     apply_model_changes(xpp_sim, model.changes)
 
     # setup simulation
-    exec_kisao_id = set_up_simulation(sim, xpp_sim['simulation_method'], config=config)
+    exec_kisao_id = preprocessed_task['algorithm_kisao_id']
 
     # run simulation
     raw_results = exec_xpp_simulation(model.source, xpp_sim)
@@ -181,12 +159,46 @@ def preprocess_sed_task(task, variables, config=None):
     Args:
         task (:obj:`Task`): task
         variables (:obj:`list` of :obj:`Variable`): variables that should be recorded
-        preprocessed_task (:obj:`PreprocessedTask`, optional): preprocessed information about the task, including possible
-            model changes and variables. This can be used to avoid repeatedly executing the same initialization for repeated
-            calls to this method.
         config (:obj:`Config`, optional): BioSimulators common configuration
 
     Returns:
         :obj:`object`: preprocessed information about the task
     """
-    pass
+    config = config or get_config()
+
+    # validate task
+    model = task.model
+    sim = task.simulation
+
+    if config.VALIDATE_SEDML:
+        raise_errors_warnings(validation.validate_task(task),
+                              error_summary='Task `{}` is invalid.'.format(task.id))
+        raise_errors_warnings(validation.validate_model_language(model.language, ModelLanguage.XPP),
+                              error_summary='Language for model `{}` is not supported.'.format(model.id))
+        raise_errors_warnings(validation.validate_model_change_types(model.changes, (ModelAttributeChange, )),
+                              error_summary='Changes for model `{}` are not supported.'.format(model.id))
+        raise_errors_warnings(*validation.validate_model_changes(model),
+                              error_summary='Changes for model `{}` are invalid.'.format(model.id))
+        raise_errors_warnings(validation.validate_simulation_type(sim, (UniformTimeCourseSimulation, )),
+                              error_summary='{} `{}` is not supported.'.format(sim.__class__.__name__, sim.id))
+        raise_errors_warnings(*validation.validate_simulation(sim),
+                              error_summary='Simulation `{}` is invalid.'.format(sim.id))
+
+    if config.VALIDATE_SEDML_MODELS:
+        raise_errors_warnings(*validation.validate_model(model, [], working_dir='.'),
+                              error_summary='Model `{}` is invalid.'.format(model.id),
+                              warning_summary='Model `{}` may be invalid.'.format(model.id))
+
+    # read model
+    _, _, xpp_sim = validate_model(model.source)
+
+    # validate observables
+    validate_variables(xpp_sim, variables)
+
+    # setup simulation
+    exec_kisao_id = set_up_simulation(sim, xpp_sim['simulation_method'], config=config)
+
+    return {
+        'xpp_simulation': xpp_sim,
+        'algorithm_kisao_id': exec_kisao_id,
+    }