diff --git a/src/Mod/Fem/FemInputWriter.py b/src/Mod/Fem/FemInputWriter.py
index d2daf583a..fd3de176c 100644
--- a/src/Mod/Fem/FemInputWriter.py
+++ b/src/Mod/Fem/FemInputWriter.py
@@ -41,28 +41,30 @@ import os
 
 
 class FemInputWriter():
-    def __init__(self, analysis_obj, mesh_obj, mat_obj,
+    def __init__(self, analysis_obj, solver_obj,
+                 mesh_obj, mat_obj,
                  fixed_obj,
                  force_obj, pressure_obj,
                  displacement_obj,
                  beamsection_obj, shellthickness_obj,
                  analysis_type, eigenmode_parameters,
                  dir_name):
-        self.dir_name = dir_name
         self.analysis = analysis_obj
+        self.solver_obj = solver_obj
         self.mesh_object = mesh_obj
         self.material_objects = mat_obj
         self.fixed_objects = fixed_obj
         self.force_objects = force_obj
         self.pressure_objects = pressure_obj
         self.displacement_objects = displacement_obj
+        self.beamsection_objects = beamsection_obj
+        self.shellthickness_objects = shellthickness_obj
+        self.analysis_type = analysis_type
         if eigenmode_parameters:
             self.no_of_eigenfrequencies = eigenmode_parameters[0]
             self.eigenfrequeny_range_low = eigenmode_parameters[1]
             self.eigenfrequeny_range_high = eigenmode_parameters[2]
-        self.analysis_type = analysis_type
-        self.beamsection_objects = beamsection_obj
-        self.shellthickness_objects = shellthickness_obj
+        self.dir_name = dir_name
         if not dir_name:
             print('Error: FemInputWriter has no working_dir --> we gone make a temporary one!')
             self.dir_name = FreeCAD.ActiveDocument.TransientDir.replace('\\', '/') + '/FemAnl_' + analysis_obj.Uid[-4:]
diff --git a/src/Mod/Fem/FemInputWriterCcx.py b/src/Mod/Fem/FemInputWriterCcx.py
index 2c3518a8e..686f2d04c 100644
--- a/src/Mod/Fem/FemInputWriterCcx.py
+++ b/src/Mod/Fem/FemInputWriterCcx.py
@@ -36,14 +36,16 @@ import FemInputWriter
 
 
 class FemInputWriterCcx(FemInputWriter.FemInputWriter):
-    def __init__(self, analysis_obj, mesh_obj, mat_obj,
+    def __init__(self, analysis_obj, solver_obj,
+                 mesh_obj, mat_obj,
                  fixed_obj,
                  force_obj, pressure_obj,
                  displacement_obj,
                  beamsection_obj, shellthickness_obj,
                  analysis_type=None, eigenmode_parameters=None,
                  dir_name=None):
-        FemInputWriter.FemInputWriter.__init__(self, analysis_obj, mesh_obj, mat_obj,
+        FemInputWriter.FemInputWriter.__init__(self, analysis_obj, solver_obj,
+                                               mesh_obj, mat_obj,
                                                fixed_obj,
                                                force_obj, pressure_obj,
                                                displacement_obj,
diff --git a/src/Mod/Fem/FemInputWriterZ88.py b/src/Mod/Fem/FemInputWriterZ88.py
index 807f52036..e45316776 100644
--- a/src/Mod/Fem/FemInputWriterZ88.py
+++ b/src/Mod/Fem/FemInputWriterZ88.py
@@ -33,14 +33,16 @@ import FemInputWriter
 
 
 class FemInputWriterZ88(FemInputWriter.FemInputWriter):
-    def __init__(self, analysis_obj, mesh_obj, mat_obj,
+    def __init__(self, analysis_obj, solver_obj,
+                 mesh_obj, mat_obj,
                  fixed_obj,
                  force_obj, pressure_obj,
                  displacement_obj,
                  beamsection_obj, shellthickness_obj,
                  analysis_type=None, eigenmode_parameters=None,
                  dir_name=None):
-        FemInputWriter.FemInputWriter.__init__(self, analysis_obj, mesh_obj, mat_obj,
+        FemInputWriter.FemInputWriter.__init__(self, analysis_obj, solver_obj,
+                                               mesh_obj, mat_obj,
                                                fixed_obj,
                                                force_obj, pressure_obj,
                                                displacement_obj,
diff --git a/src/Mod/Fem/FemToolsCcx.py b/src/Mod/Fem/FemToolsCcx.py
index 212b66c0d..20888c5e4 100644
--- a/src/Mod/Fem/FemToolsCcx.py
+++ b/src/Mod/Fem/FemToolsCcx.py
@@ -87,7 +87,8 @@ class FemToolsCcx(FemTools.FemTools):
         import sys
         self.inp_file_name = ""
         try:
-            inp_writer = iw.FemInputWriterCcx(self.analysis, self.mesh, self.materials,
+            inp_writer = iw.FemInputWriterCcx(self.analysis, self.solver,
+                                              self.mesh, self.materials,
                                               self.fixed_constraints,
                                               self.force_constraints, self.pressure_constraints,
                                               self.displacement_constraints,
diff --git a/src/Mod/Fem/FemToolsZ88.py b/src/Mod/Fem/FemToolsZ88.py
index 2e9dcdf47..9eb8bba72 100644
--- a/src/Mod/Fem/FemToolsZ88.py
+++ b/src/Mod/Fem/FemToolsZ88.py
@@ -80,7 +80,8 @@ class FemToolsZ88(FemTools.FemTools):
         import sys
         self.inp_file_name = ""
         try:
-            inp_writer = iw.FemInputWriterZ88(self.analysis, self.mesh, self.materials,
+            inp_writer = iw.FemInputWriterZ88(self.analysis, self.solver,
+                                              self.mesh, self.materials,
                                               self.fixed_constraints,
                                               self.force_constraints, self.pressure_constraints,
                                               self.displacement_constraints,