diff --git a/coverage/.coveragerc.template b/coverage/.coveragerc.template
index e5e634c2c256103b1796d9309a3433ae9f248e70..8863d4d6ea58b967949a888d85af02d979244420 100644
--- a/coverage/.coveragerc.template
+++ b/coverage/.coveragerc.template
@@ -1,5 +1,5 @@
 [run]
-data_file = ~/teraflow/controller/coverage/.coverage
+data_file = ~/tfs-ctrl/coverage/.coverage
 source = .
 omit =
     */proto/*
@@ -12,7 +12,7 @@ exclude_lines =
     raise\ NotImplementedError
 
 [html]
-directory = ~/teraflow/controller/coverage/html_report
+directory = ~/tfs-ctrl/coverage/html_report
 
 [xml]
 output = ~/teraflow/controller/coverage/report.xml
diff --git a/src/common/Constants.py b/src/common/Constants.py
index d606c0d031631ff4e105775b51f189fdcbe063d1..9f015b8c737d4c16c6ceaf72a01afd4a7546823d 100644
--- a/src/common/Constants.py
+++ b/src/common/Constants.py
@@ -33,9 +33,9 @@ DEFAULT_METRICS_PORT = 9192
 DEFAULT_CONTEXT_NAME      = 'admin'
 DEFAULT_TOPOLOGY_NAME     = 'admin'     # contains the detailed local topology
 INTERDOMAIN_TOPOLOGY_NAME = 'inter'     # contains the abstract inter-domain topology
-DEFAULT_CONTEXT_UUID      = str(uuid.uuid5(uuid.NAMESPACE_OID, DEFAULT_CONTEXT_NAME     ))
-DEFAULT_TOPOLOGY_UUID     = str(uuid.uuid5(uuid.NAMESPACE_OID, DEFAULT_TOPOLOGY_NAME    ))
-INTERDOMAIN_TOPOLOGY_UUID = str(uuid.uuid5(uuid.NAMESPACE_OID, INTERDOMAIN_TOPOLOGY_NAME))
+#DEFAULT_CONTEXT_UUID      = str(uuid.uuid5(uuid.NAMESPACE_OID, DEFAULT_CONTEXT_NAME     ))
+#DEFAULT_TOPOLOGY_UUID     = str(uuid.uuid5(uuid.NAMESPACE_OID, DEFAULT_TOPOLOGY_NAME    ))
+#INTERDOMAIN_TOPOLOGY_UUID = str(uuid.uuid5(uuid.NAMESPACE_OID, INTERDOMAIN_TOPOLOGY_NAME))
 
 # Default service names
 class ServiceNameEnum(Enum):
diff --git a/src/common/rpc_method_wrapper/ServiceExceptions.py b/src/common/rpc_method_wrapper/ServiceExceptions.py
index e516953c5b1e569ab997288cd1d38e371bf07936..369565cf8d76975426174ba35ec14140526e8a39 100644
--- a/src/common/rpc_method_wrapper/ServiceExceptions.py
+++ b/src/common/rpc_method_wrapper/ServiceExceptions.py
@@ -13,7 +13,7 @@
 # limitations under the License.
 
 import grpc
-from typing import Iterable, Union
+from typing import Iterable, List, Tuple, Union
 
 class ServiceException(Exception):
     def __init__(
@@ -21,7 +21,7 @@ class ServiceException(Exception):
     ) -> None:
         self.code = code
         if isinstance(extra_details, str): extra_details = [extra_details]
-        self.details = '; '.join(map(str, [details] + extra_details))
+        self.details = '; '.join([str(item) for item in ([details] + extra_details)])
         super().__init__(self.details)
 
 class NotFoundException(ServiceException):
@@ -45,6 +45,14 @@ class InvalidArgumentException(ServiceException):
         details = '{:s}({:s}) is invalid'.format(str(argument_name), str(argument_value))
         super().__init__(grpc.StatusCode.INVALID_ARGUMENT, details, extra_details=extra_details)
 
+class InvalidArgumentsException(ServiceException):
+    def __init__(
+        self, arguments : List[Tuple[str, str]], extra_details : Union[str, Iterable[str]] = None
+    ) -> None:
+        str_arguments = ', '.join(['{:s}({:s})'.format(name, value) for name,value in arguments])
+        details = 'Arguments {:s} are invalid'.format(str_arguments)
+        super().__init__(grpc.StatusCode.INVALID_ARGUMENT, details, extra_details=extra_details)
+
 class OperationFailedException(ServiceException):
     def __init__(
         self, operation : str, extra_details : Union[str, Iterable[str]] = None
diff --git a/src/common/tools/object_factory/Service.py b/src/common/tools/object_factory/Service.py
index be8eefe5bc032ad6a45fd54b267db6ab12e3f5b0..66785fbb45ab83663e87c67387a84f20c607a317 100644
--- a/src/common/tools/object_factory/Service.py
+++ b/src/common/tools/object_factory/Service.py
@@ -14,7 +14,7 @@
 
 import copy
 from typing import Dict, List, Optional
-from common.Constants import DEFAULT_CONTEXT_UUID
+from common.Constants import DEFAULT_CONTEXT_NAME
 from common.proto.context_pb2 import ServiceStatusEnum, ServiceTypeEnum
 from common.tools.object_factory.Context import json_context_id
 
@@ -44,7 +44,7 @@ def json_service(
 
 def json_service_l3nm_planned(
         service_uuid : str, endpoint_ids : List[Dict] = [], constraints : List[Dict] = [],
-        config_rules : List[Dict] = [], context_uuid : str = DEFAULT_CONTEXT_UUID
+        config_rules : List[Dict] = [], context_uuid : str = DEFAULT_CONTEXT_NAME
     ):
 
     return json_service(
@@ -54,7 +54,7 @@ def json_service_l3nm_planned(
 
 def json_service_tapi_planned(
         service_uuid : str, endpoint_ids : List[Dict] = [], constraints : List[Dict] = [],
-        config_rules : List[Dict] = [], context_uuid : str = DEFAULT_CONTEXT_UUID
+        config_rules : List[Dict] = [], context_uuid : str = DEFAULT_CONTEXT_NAME
     ):
 
     return json_service(
@@ -64,7 +64,7 @@ def json_service_tapi_planned(
 
 def json_service_p4_planned(
         service_uuid : str, endpoint_ids : List[Dict] = [], constraints : List[Dict] = [],
-        config_rules : List[Dict] = [], context_uuid : str = DEFAULT_CONTEXT_UUID
+        config_rules : List[Dict] = [], context_uuid : str = DEFAULT_CONTEXT_NAME
     ):
 
     return json_service(