diff --git a/UNICADOworkflow/src/clean_up/clean_up_temporary_results.py b/UNICADOworkflow/src/clean_up/clean_up_temporary_results.py
index c807607b94ff775ce64663a827d934969b180ed7..338ceb41b10fab905bff1d37c3b1811e3b492e6d 100644
--- a/UNICADOworkflow/src/clean_up/clean_up_temporary_results.py
+++ b/UNICADOworkflow/src/clean_up/clean_up_temporary_results.py
@@ -249,11 +249,10 @@ def clean_up_temporary_results(paths_and_names, parameter_for_design_case, contr
 
         # call function to write parameter study output data to output csv-file
         if not skip_saving_flag:
-            status_csv_output, log_file_list = write_parameter_study_csv_output(path_of_working_directory_rce,
-                                                                                path_of_working_directory,
-                                                                                copy_target_path,
-                                                                                parameter_for_design_case,
-                                                                                log_file_list, current_workflow_name)
+            _, log_file_list = write_parameter_study_csv_output(path_of_working_directory_rce,
+                                                                path_of_working_directory, copy_target_path,
+                                                                parameter_for_design_case, log_file_list,
+                                                                current_workflow_name)
 
     ''' copy tool error list log-file to log-file results '''
     if not skip_saving_flag:
diff --git a/UNICADOworkflow/src/parameter_study/initialize_parameter_study.py b/UNICADOworkflow/src/parameter_study/initialize_parameter_study.py
index 91753f87d9b047b51c55f8f457a7bfc1e5e57048..9811794f7381eee03cad010bbd2b1c2d557497ba 100644
--- a/UNICADOworkflow/src/parameter_study/initialize_parameter_study.py
+++ b/UNICADOworkflow/src/parameter_study/initialize_parameter_study.py
@@ -142,13 +142,12 @@ def initialize_parameter_study(paths_and_names, log_file_list):
     if reproduce_output_file_from_old_study == 1:
         # check if the working directory of old study is existing
         #  -> if true: -> set path of old study to path of current
+        corrected_path_is_absolute, path_to_folder_old_study = path_check(path_to_folder_old_study)
+        if not corrected_path_is_absolute:
+            path_to_folder_old_study = path_of_working_directory_rce + path_to_folder_old_study
         if os.path.isdir(path_to_folder_old_study):
-            # call function to check the path of old study
-            _, path_to_folder_old_study = path_check(path_to_folder_old_study)
-
             # set path to reference case of old parameter study to resume
             path_to_folder_old_reference = path_to_folder_old_study + 'reference_aircraft/'
-
             # check if the reference aircraft directory exist -> if true perform the resume of the parameter study
             if os.path.isdir(path_to_folder_old_reference):
                 temporary_working_directory = path_of_working_directory_rce + current_workflow_name
@@ -156,11 +155,11 @@ def initialize_parameter_study(paths_and_names, log_file_list):
                 paths_and_names, abort_parameter_study_flag, log_file_list =\
                     prepare_resume_of_parameter_study(paths_and_names, path_to_folder_old_reference,
                                                       temporary_working_directory, log_file_list)
-
-                # call function to check which parameter is next to analyse
-                abort_parameter_study_flag, number_of_total_steps, log_file_list = \
-                    set_parameter_for_resume_parameter_study(paths_and_names, path_to_folder_old_study,
-                                                             log_file_list)
+                if not abort_parameter_study_flag:
+                    # call function to check which parameter is next to analyse
+                    abort_parameter_study_flag, number_of_total_steps, log_file_list = \
+                        set_parameter_for_resume_parameter_study(paths_and_names, path_to_folder_old_study,
+                                                                log_file_list)
 
             # else condition: the reference aircraft directory does not exist -> abort parameter study
             else:
diff --git a/UNICADOworkflow/src/parameter_study/prepare_resume_of_parameter_study.py b/UNICADOworkflow/src/parameter_study/prepare_resume_of_parameter_study.py
index 7cac7875347697eb1eae82b991955660f0af7ac4..0827eb45f49e9ae911fc0d416551a3b44a8d80e8 100644
--- a/UNICADOworkflow/src/parameter_study/prepare_resume_of_parameter_study.py
+++ b/UNICADOworkflow/src/parameter_study/prepare_resume_of_parameter_study.py
@@ -115,13 +115,16 @@ def prepare_resume_of_parameter_study(paths_and_names, path_to_folder_old_refere
         list_of_temporary_files = os.listdir(temporary_working_directory)
         for list_element in list_of_temporary_files:
             # check if current list element is a directory -> if true: -> delete directory and sub folder if exist
-            if os.path.isdir(temporary_working_directory + '/' + list_element):
+            if (os.path.isdir(temporary_working_directory + '/' + list_element)
+                and not list_element == 'fuselage_design_lib'
+                and not list_element == 'landing_gear_lib'):
                 shutil.rmtree(temporary_working_directory + '/' + list_element)
 
             # else condition: current list element is a file -> delete file
             else:
                 # check if the current file is not the workflow log file -> if true: -> delete file
-                if not list_element == 'unicado_workflow.log':
+                if (os.path.isfile(temporary_working_directory + '/' + list_element)
+                    and not list_element == 'unicado_workflow.log'):
                     os.remove(temporary_working_directory + '/' + list_element)
 
         # read name of aircraft project from old parameter study
@@ -130,7 +133,7 @@ def prepare_resume_of_parameter_study(paths_and_names, path_to_folder_old_refere
 
         # create new aircraft project folder in temporary working directory
         if not os.path.isdir(temporary_working_directory + '/' + aircraft_project[:-4]):
-            os.makedirs(temporary_working_directory + '/' + aircraft_project[:-4] + '/cleanSheetDesign')
+            os.makedirs(temporary_working_directory + '/' + aircraft_project[:-4] + '/clean_sheet_design')
 
         # create new temporary result folder in temporary working directory
         if not os.path.isdir(temporary_working_directory + '/temporaryResults'):
@@ -140,9 +143,11 @@ def prepare_resume_of_parameter_study(paths_and_names, path_to_folder_old_refere
         if not os.path.isdir(temporary_working_directory + '/temp'):
             os.mkdir(temporary_working_directory + '/temp')
 
-        # read elements from old parameter study directory
+        # read elements from old parameter study directory and check of required files are there
         list_of_elements = os.listdir(path_to_folder_old_reference)
-        if not 'parameter_study_conf.xml' in list_of_elements:
+        if (not 'parameter_study_conf.xml' in list_of_elements
+            or not 'config_files/preExecution' in list_of_elements
+            or not 'engine_data' in list_of_elements):
             abort_parameter_study_flag = True
 
         for element in list_of_elements:
@@ -179,18 +184,12 @@ def prepare_resume_of_parameter_study(paths_and_names, path_to_folder_old_refere
                                         temporary_working_directory + '/' + aircraft_project[:-4] + '/'
                                     xml_tree.write(path, encoding='utf-8')
 
-                    else:
-                        abort_parameter_study_flag = True
-
                 # reset engine files to files of old parameter study
                 if element == 'engine_data':
                     shutil.copytree(path_to_folder_old_reference + element,
                                     temporary_working_directory + '/' + aircraft_project[:-4] + '/engine_data')
 
-                else:
-                    abort_parameter_study_flag = True
-
-                # reset all lean sheet design files to files of old parameter study
+                # reset all clean sheet design files to files of old parameter study
                 if element == 'results':
                     list_of_results = os.listdir(path_to_folder_old_reference + element)
                     for result in list_of_results:
@@ -214,9 +213,6 @@ def prepare_resume_of_parameter_study(paths_and_names, path_to_folder_old_refere
                             shutil.copyfile(path_to_folder_old_reference + element,
                                             temporary_working_directory + '/' + aircraft_project[:-4] + '/' + element)
 
-                        else:
-                            abort_parameter_study_flag = True
-
                         # check if the current element contains the string 'CPACS'
                         #  -> if true: -> copy aircraft exchange file to project folder
                         if 'start' in element:
diff --git a/UNICADOworkflow/src/parameter_study/write_parameter_study_csv_output.py b/UNICADOworkflow/src/parameter_study/write_parameter_study_csv_output.py
index 27bfcbc13bdd82a0054188ca1a294aacc8d47bb6..3e59036a15b164ec1116f9a98e7475b32bc25266 100644
--- a/UNICADOworkflow/src/parameter_study/write_parameter_study_csv_output.py
+++ b/UNICADOworkflow/src/parameter_study/write_parameter_study_csv_output.py
@@ -100,7 +100,7 @@ def write_parameter_study_csv_output(path_of_working_directory_rce, path_of_work
         "./ProgramSettings/ParameterSettings/OutputParameters").text)
 
     ''' write header to output csv-file of current parameter '''
-    if global_loop_counter == 1 or study_counter == 1:
+    if global_loop_counter == 1 or study_counter <= 1:
         if global_loop_counter == 1:
             header_string = '# ID;' + 'reference aircraft;'
             print('Header string of reference case successfully writen to parameter study output csv-file!')
@@ -108,7 +108,7 @@ def write_parameter_study_csv_output(path_of_working_directory_rce, path_of_work
                                  'Header string of reference case successfully writen to parameter study '
                                  'output csv-file!')
 
-        if study_counter == 1:
+        if study_counter <= 1:
             header_string = '# ID;' + parameter_name + ';'
             print('Header string of current input parameter successfully writen to parameter study output csv-file.')
             log_file_list.append(str(datetime.now().strftime('%Y-%m-%d %H:%M:%S')) + ': '
@@ -197,6 +197,8 @@ def write_parameter_study_csv_output(path_of_working_directory_rce, path_of_work
     # generate the first two entries of output string
     if global_loop_counter == 1:
         value_string = 'run_' + str(global_loop_counter) + ';' + 'refCase;'
+    elif study_counter == 0:
+        value_string = 'run_' + str(study_counter + 1) + ';' + str(new_value_of_input) + ';'
     else:
         value_string = 'run_' + str(study_counter) + ';' + str(new_value_of_input) + ';'
 
diff --git a/UNICADOworkflow/src/pre_condition/check_design_logic.py b/UNICADOworkflow/src/pre_condition/check_design_logic.py
index 71ddeba88531cb4859ce18de1f1626813365b486..3201d86eaf1dc3b7604d6391278909e84abbef3a 100644
--- a/UNICADOworkflow/src/pre_condition/check_design_logic.py
+++ b/UNICADOworkflow/src/pre_condition/check_design_logic.py
@@ -476,13 +476,19 @@ def check_design_logic(paths_and_names, parameter_for_design_case, control_setti
         # call function to initialize parameter study
         abort_parameter_study_flag, outer_loop_counter, log_file_list = initialize_parameter_study(paths_and_names,
                                                                                                    log_file_list)
-        print(' * ------ end initialize parameter study ------')
-        log_file_list.append(' * ------ end initialize parameter study ------')
 
         # check if the abort_parameter_study_flag is equal to True -> if true: -> set parameter_study_mode switch to 0
         if abort_parameter_study_flag:
+            print('Error in preparation of parameter_study.'
+                  ' Abort parameter_study and continue with standard aircraft design!')
+            log_file_list.append('Error in preparation of parameter_study.'
+                  ' Abort parameter_study and continue with standard aircraft design!')
             outer_loop_counter = back_up_outer_loop_counter
-            ([item for item in parameter_for_design_case if 'parameter_study_mode' in item])[-1][-1] = int(0)
+            ([item for item in parameter_for_design_case if 'program_mode' in item])[-1][-1] =\
+                'standard_aircraft_design'
+
+        print(' * ------ end initialize parameter study ------')
+        log_file_list.append(' * ------ end initialize parameter study ------')
 
     ''' write log-file to system '''
     log_file_list.append('********************************************** end check design logic '