diff --git a/framework/CodeInterfaces/Generic/GenericCodeInterface.py b/framework/CodeInterfaces/Generic/GenericCodeInterface.py
index b11aa32621..f5c034ac5d 100644
--- a/framework/CodeInterfaces/Generic/GenericCodeInterface.py
+++ b/framework/CodeInterfaces/Generic/GenericCodeInterface.py
@@ -182,5 +182,5 @@ def createNewInput(self,currentInputFiles,origInputFiles,samplerType,**Kwargs):
         origfiles.append(inputFile)
     parser = GenericParser.GenericParser(infiles)
     parser.modifyInternalDictionary(**Kwargs)
-    parser.writeNewInput(currentInputFiles,origfiles)
+    parser.writeNewInput(infiles,origfiles)
     return currentInputFiles
diff --git a/framework/Models/Code.py b/framework/Models/Code.py
index 53ff72d807..c6e3605461 100644
--- a/framework/Models/Code.py
+++ b/framework/Models/Code.py
@@ -848,8 +848,8 @@ def submit(self, myInput, samplerType, jobHandler, **kwargs):
            a mandatory key is the sampledVars'that contains a dictionary {'name variable':value}
         @ Out, None
     """
-    prefix = kwargs['prefix'] if 'prefix' in kwargs else None
-    uniqueHandler = kwargs['uniqueHandler'] if 'uniqueHandler' in kwargs.keys() else 'any'
+    prefix = kwargs.get("prefix")
+    uniqueHandler = kwargs.get("uniqueHandler",'any')
 
     ## These two are part of the current metadata, so they will be added before
     ## the job is started, so that they will be captured in the metadata and match
diff --git a/framework/Models/Model.py b/framework/Models/Model.py
index e6564b0c8b..1d5d258a85 100644
--- a/framework/Models/Model.py
+++ b/framework/Models/Model.py
@@ -369,8 +369,9 @@ def submit(self, myInput, samplerType, jobHandler, **kwargs):
            a mandatory key is the sampledVars'that contains a dictionary {'name variable':value}
         @ Out, None
     """
-    prefix = kwargs['prefix'] if 'prefix' in kwargs else None
-    uniqueHandler = kwargs['uniqueHandler'] if 'uniqueHandler' in kwargs.keys() else 'any'
+    prefix = kwargs.get("prefix")
+    uniqueHandler = kwargs.get("uniqueHandler",'any')
+    forceThreads = kwargs.get("forceThreads",False)
 
     ## These kwargs are updated by createNewInput, so the job either should not
     ## have access to the metadata, or it needs to be updated from within the
@@ -382,37 +383,7 @@ def submit(self, myInput, samplerType, jobHandler, **kwargs):
     ## works, we are unable to pass a member function as a job because the
     ## pp library loses track of what self is, so instead we call it from the
     ## class and pass self in as the first parameter
-    jobHandler.addJob((self, myInput, samplerType, kwargs), self.__class__.evaluateSample, prefix, metadata=metadata, modulesToImport=self.mods, uniqueHandler=uniqueHandler)
-
-  def submitAsClient(self, myInput, samplerType, jobHandler, **kwargs):
-    """
-        This will submit an individual sample to be evaluated by this model to a
-        specified jobHandler as a client job. Note, some parameters are needed
-        by createNewInput and thus descriptions are copied from there.
-        @ In, myInput, list, the inputs (list) to start from to generate the new
-          one
-        @ In, samplerType, string, is the type of sampler that is calling to
-          generate a new input
-        @ In,  jobHandler, JobHandler instance, the global job handler instance
-        @ In, **kwargs, dict,  is a dictionary that contains the information
-          coming from the sampler, a mandatory key is the sampledVars' that
-          contains a dictionary {'name variable':value}
-        @ Out, None
-    """
-    prefix = kwargs['prefix'] if 'prefix' in kwargs else None
-    uniqueHandler = kwargs['uniqueHandler'] if 'uniqueHandler' in kwargs.keys() else 'any'
-
-    ## These kwargs are updated by createNewInput, so the job either should not
-    ## have access to the metadata, or it needs to be updated from within the
-    ## evaluateSample function, which currently is not possible since that
-    ## function does not know about the job instance.
-    metadata = kwargs
-
-    ## This may look a little weird, but due to how the parallel python library
-    ## works, we are unable to pass a member function as a job because the
-    ## pp library loses track of what self is, so instead we call it from the
-    ## class and pass self in as the first parameter
-    jobHandler.addClientJob((self, myInput, samplerType, kwargs), self.__class__.evaluateSample, prefix, metadata=metadata, modulesToImport=self.mods, uniqueHandler=uniqueHandler)
+    jobHandler.addJob((self, myInput, samplerType, kwargs), self.__class__.evaluateSample, prefix, metadata=metadata, modulesToImport=self.mods, uniqueHandler=uniqueHandler, forceUseThreads=forceThreads)
 
   def addOutputFromExportDictionary(self,exportDict,output,options,jobIdentifier):
     """
diff --git a/framework/Models/PostProcessor.py b/framework/Models/PostProcessor.py
index 6db5169f06..88929a52bf 100644
--- a/framework/Models/PostProcessor.py
+++ b/framework/Models/PostProcessor.py
@@ -203,12 +203,8 @@ def submit(self,myInput,samplerType,jobHandler,**kwargs):
            a mandatory key is the sampledVars'that contains a dictionary {'name variable':value}
         @ Out, None
     """
-
-    ## This may look a little weird, but due to how the parallel python library
-    ## works, we are unable to pass a member function as a job because the
-    ## pp library loses track of what self is, so instead we call it from the
-    ## class and pass self in as the first parameter
-    jobHandler.addJob((self, myInput, samplerType, kwargs), self.__class__.evaluateSample, str(0), modulesToImport=self.mods, forceUseThreads=True)
+    kwargs['forceThreads'] = True
+    Model.submit(self,myInput, samplerType, jobHandler,**kwargs)
 
   def evaluateSample(self, myInput, samplerType, kwargs):
     """
diff --git a/tests/framework/CodeInterfaceTests/GenericInterface/inp.three b/tests/framework/CodeInterfaceTests/GenericInterface/inp.three
new file mode 100644
index 0000000000..7569a8b9c5
--- /dev/null
+++ b/tests/framework/CodeInterfaceTests/GenericInterface/inp.three
@@ -0,0 +1,5 @@
+<?xml version="1.0" ?>
+<properties>
+  <x>10</x>
+  <z>1</z>
+</properties>
diff --git a/tests/framework/CodeInterfaceTests/test_generic_interface.xml b/tests/framework/CodeInterfaceTests/test_generic_interface.xml
index 6d2987fdb1..727810e58d 100644
--- a/tests/framework/CodeInterfaceTests/test_generic_interface.xml
+++ b/tests/framework/CodeInterfaceTests/test_generic_interface.xml
@@ -26,6 +26,7 @@
   <Files>
     <Input name="one.xml" type="">one.xml</Input>
     <Input name="inp.two" type="">inp.two</Input>
+    <Input name="inp.three" type="">inp.three</Input>
     <Input name="mesh" type="">dummy.e</Input>
     <Input name="a_dummy_file_for_subdirectory" type="" subDirectory="testSubDirectory">dummy_file_for_subdirectory.dummy</Input>
   </Files>
@@ -36,6 +37,7 @@
       <clargs arg="python" type="prepend"/>
       <clargs arg="-i" extension=".xml" type="input"/>
       <clargs arg="-a" extension=".two" type="input"/>
+      <clargs arg="-a" extension=".three" type="input"/>
       <clargs arg="-o" type="output"/>
     </Code>
   </Models>
@@ -68,6 +70,7 @@
     <MultiRun name="sample">
       <Input class="Files" type="">inp.two</Input>
       <Input class="Files" type="">one.xml</Input>
+      <Input class="Files" type="">inp.three</Input>
       <Input class="Files" type="">mesh</Input>
       <Input class="Files" type="">a_dummy_file_for_subdirectory</Input>
       <Model class="Models" type="Code">poly</Model>