diff --git a/autosubmit/config/config_common.py b/autosubmit/config/config_common.py
index 70356b200bfc2d840b14978c58ac8349a1e14d2b..2ead2c3f10cbab4e8ca6b760fdca12ddcb56b3f7 100644
--- a/autosubmit/config/config_common.py
+++ b/autosubmit/config/config_common.py
@@ -162,7 +162,7 @@ class AutosubmitConfig(object):
         :return: threads needed
         :rtype: str
         """
-        return int(self._jobs_parser.get_option(section, 'THREADS', 1))
+        return str(self._jobs_parser.get_option(section, 'THREADS', 1))
 
     def get_tasks(self, section):
         """
@@ -170,9 +170,9 @@ class AutosubmitConfig(object):
         :param section: job type
         :type section: str
         :return: tasks (processes) per host
-        :rtype: int
+        :rtype: str
         """
-        return int(self._jobs_parser.get_option(section, 'TASKS', 0))
+        return str(self._jobs_parser.get_option(section, 'TASKS', 0))
 
     def get_scratch_free_space(self, section):
         """
diff --git a/autosubmit/job/job.py b/autosubmit/job/job.py
index d0d8a18420882ef94ca6f8c17dd74130be7d2682..dfe72425ceff41855100daf626327d615b2297ea 100644
--- a/autosubmit/job/job.py
+++ b/autosubmit/job/job.py
@@ -59,8 +59,8 @@ class Job(object):
         self.platform_name = None
         self.section = None
         self.wallclock = None
-        self.tasks = None
-        self.threads = None
+        self.tasks = '1'
+        self.threads = '1'
         self.processors = '1'
         self.memory = ''
         self.memory_per_task = ''
diff --git a/autosubmit/job/job_dict.py b/autosubmit/job/job_dict.py
index aa01e9d9300a809490af2c2468d129810f2b819b..1775768194ce83e3b3423d1e076f8663f55ba35c 100644
--- a/autosubmit/job/job_dict.py
+++ b/autosubmit/job/job_dict.py
@@ -292,8 +292,8 @@ class DicJobs:
         job.queue = self.get_option(section, "QUEUE", None)
         job.check = self.get_option(section, "CHECK", 'True').lower()
         job.processors = str(self.get_option(section, "PROCESSORS", 1))
-        job.threads = self.get_option(section, "THREADS", '')
-        job.tasks = self.get_option(section, "TASKS", '')
+        job.threads = str(self.get_option(section, "THREADS", 1))
+        job.tasks = str(self.get_option(section, "TASKS", 1))
         job.memory = self.get_option(section, "MEMORY", '')
         job.memory_per_task = self.get_option(section, "MEMORY_PER_TASK", '')
         job.wallclock = self.get_option(section, "WALLCLOCK", '')
diff --git a/autosubmit/platforms/headers/ec_cca_header.py b/autosubmit/platforms/headers/ec_cca_header.py
index 9037c9c59d2391e9161343aa546d6413795b6245..c621bbfc8af41e9b10b01f2cfdab77629f99b396 100644
--- a/autosubmit/platforms/headers/ec_cca_header.py
+++ b/autosubmit/platforms/headers/ec_cca_header.py
@@ -38,14 +38,14 @@ class EcCcaHeader(object):
 
     # noinspection PyMethodMayBeStatic
     def get_tasks_per_node(self, job):
-        if not isinstance(job.tasks, int):
+        if not isinstance(job.tasks, str):
             return ""
         else:
             return '#PBS -l EC_tasks_per_node={0}'.format(job.tasks)
 
     # noinspection PyMethodMayBeStatic
     def get_threads_per_task(self, job):
-        if not isinstance(job.threads, int):
+        if not isinstance(job.threads, str):
             return ""
         else:
             return '#PBS -l EC_threads_per_task={0}'.format(job.threads)
diff --git a/test/unit/test_autosubmit_ config.py b/test/unit/test_autosubmit_config.py
similarity index 99%
rename from test/unit/test_autosubmit_ config.py
rename to test/unit/test_autosubmit_config.py
index eea91d336856c96fb4f68cd10ffc575cd89db987..560b8b4801629620adfd41fd566f40be4b440a5e 100644
--- a/test/unit/test_autosubmit_ config.py	
+++ b/test/unit/test_autosubmit_config.py
@@ -108,23 +108,23 @@ class TestAutosubmitConfig(TestCase):
 
     def test_get_threads(self):
         # arrange
-        expected_value = 99999
+        expected_value = '99999'
         default_value = 1
         config, parser_mock = self._arrange_config(expected_value)
         # act
         returned_value = config.get_threads(self.section)
         # assert
-        self._assert_get_option(parser_mock, 'THREADS', expected_value, returned_value, default_value, int)
+        self._assert_get_option(parser_mock, 'THREADS', expected_value, returned_value, default_value, str)
 
     def test_get_tasks(self):
         # arrange
-        expected_value = 99999
+        expected_value = '99999'
         default_value = 0
         config, parser_mock = self._arrange_config(expected_value)
         # act
         returned_value = config.get_tasks(self.section)
         # assert
-        self._assert_get_option(parser_mock, 'TASKS', expected_value, returned_value, default_value, int)
+        self._assert_get_option(parser_mock, 'TASKS', expected_value, returned_value, default_value, str)
 
     def test_get_memory(self):
         # arrange
diff --git a/test/unit/test_dic_jobs.py b/test/unit/test_dic_jobs.py
index 49b6c5c220313f9215e4e1fd573dfb36a8f2de4c..3234d79e2d373d2924274f493fc3ac3f3f9713c0 100644
--- a/test/unit/test_dic_jobs.py
+++ b/test/unit/test_dic_jobs.py
@@ -287,8 +287,8 @@ class TestDicJobs(TestCase):
         filename = 'fake-fike'
         queue = 'fake-queue'
         processors = '111'
-        threads = 222
-        tasks = 333
+        threads = '222'
+        tasks = '333'
         memory = memory_per_task = 444
         wallclock = 555
         notify_on = 'COMPLETED FAILED'