diff --git a/src/Mod/Fem/femsolver/run.py b/src/Mod/Fem/femsolver/run.py
index 78588dcaa4..e541b960d3 100644
--- a/src/Mod/Fem/femsolver/run.py
+++ b/src/Mod/Fem/femsolver/run.py
@@ -35,7 +35,7 @@ __url__ = "http://www.freecadweb.org"
 
 import os
 import os.path
-import threading
+# import threading  # not used ATM
 import shutil
 
 import FreeCAD as App
@@ -498,4 +498,3 @@ class _DocObserver(object):
             if femutils.is_derived_from(obj, t):
                 return True
         return False
-
diff --git a/src/Mod/Fem/femsolver/settings.py b/src/Mod/Fem/femsolver/settings.py
index a2dded35f0..594b544b76 100644
--- a/src/Mod/Fem/femsolver/settings.py
+++ b/src/Mod/Fem/femsolver/settings.py
@@ -146,7 +146,7 @@ def get_dir_setting():
 
 class _SolverDlg(object):
     """ Internal query logic for solver specific settings.
-    
+
     Each instance queries settings for one specific solver (e.g. Elmer) common
     among all solvers. To clarify: There are a few settings that are useful
     for every solver (e.g. where to find the solver binary) but the value and
@@ -154,22 +154,22 @@ class _SolverDlg(object):
     class contains all the solver specific paths needed. The settings can be
     queried via the methods which use those path members to query the value for
     the specific solver.
-    
+
     :ivar default:
         Default binary name as a string preferably without a prefix path to
         make it more generic (e.g. "ccx"). This only works if the binary can be
         found via the PATH environment variable on linux or similar mechanisms
         on other operating systems. Used if nothing else is specified by the
         user.
-    
+
     :ivar param_path:
         Parent param path (FreeCADs settings/parameter system) that contains
         all settings for the specific solver.
-    
+
     :ivar use_default:
         Param path identifying the "use_default" setting. Only specifie the
         last part as the *param_path* is prepended to this value.
-    
+
     :ivar custom_path:
         Param path identifying the "custom_path" setting. Only specifie the
         last part as the *param_path* is prepended to this value.