diff --git a/python/Tutorials/Bent_Patch_Antenna.py b/python/Tutorials/Bent_Patch_Antenna.py
index 5d3e568..6d8cd58 100644
--- a/python/Tutorials/Bent_Patch_Antenna.py
+++ b/python/Tutorials/Bent_Patch_Antenna.py
@@ -131,7 +131,8 @@ if 0:  # debugging only
     if not os.path.exists(Sim_Path):
         os.mkdir(Sim_Path)
     CSX.Write2XML(CSX_file)
-    os.system(r'AppCSXCAD "{}"'.format(CSX_file))
+    from CSXCAD import AppCSXCAD_BIN
+    os.system(AppCSXCAD_BIN + ' "{}"'.format(CSX_file))
 
 
 if not post_proc_only:
diff --git a/python/Tutorials/CRLH_Extraction.py b/python/Tutorials/CRLH_Extraction.py
index 00984d3..2c42738 100644
--- a/python/Tutorials/CRLH_Extraction.py
+++ b/python/Tutorials/CRLH_Extraction.py
@@ -170,7 +170,8 @@ if __name__ == '__main__':
         if not os.path.exists(Sim_Path):
             os.mkdir(Sim_Path)
         CSX.Write2XML(CSX_file)
-        os.system(r'AppCSXCAD "{}"'.format(CSX_file))
+        from CSXCAD import AppCSXCAD_BIN
+        os.system(AppCSXCAD_BIN + ' "{}"'.format(CSX_file))
 
     if not post_proc_only:
         FDTD.Run(Sim_Path, verbose=3, cleanup=True)
diff --git a/python/Tutorials/Helical_Antenna.py b/python/Tutorials/Helical_Antenna.py
index 3211ec8..6e802de 100644
--- a/python/Tutorials/Helical_Antenna.py
+++ b/python/Tutorials/Helical_Antenna.py
@@ -123,7 +123,8 @@ if 0:  # debugging only
     if not os.path.exists(Sim_Path):
         os.mkdir(Sim_Path)
     CSX.Write2XML(CSX_file)
-    os.system(r'AppCSXCAD "{}"'.format(CSX_file))
+    from CSXCAD import AppCSXCAD_BIN
+    os.system(AppCSXCAD_BIN + ' "{}"'.format(CSX_file))
 
 if not post_proc_only:
     FDTD.Run(Sim_Path, verbose=3, cleanup=True)
diff --git a/python/Tutorials/MSL_NotchFilter.py b/python/Tutorials/MSL_NotchFilter.py
index 0448aa0..a522ce2 100644
--- a/python/Tutorials/MSL_NotchFilter.py
+++ b/python/Tutorials/MSL_NotchFilter.py
@@ -98,7 +98,8 @@ if 0:  # debugging only
     if not os.path.exists(Sim_Path):
         os.mkdir(Sim_Path)
     CSX.Write2XML(CSX_file)
-    os.system(r'AppCSXCAD "{}"'.format(CSX_file))
+    from CSXCAD import AppCSXCAD_BIN
+    os.system(AppCSXCAD_BIN + ' "{}"'.format(CSX_file))
 
 
 if not post_proc_only:
diff --git a/python/Tutorials/RCS_Sphere.py b/python/Tutorials/RCS_Sphere.py
index db3eae2..5a6384d 100644
--- a/python/Tutorials/RCS_Sphere.py
+++ b/python/Tutorials/RCS_Sphere.py
@@ -79,7 +79,8 @@ if 0:  # debugging only
     if not os.path.exists(Sim_Path):
         os.mkdir(Sim_Path)
     CSX.Write2XML(CSX_file)
-    os.system(r'AppCSXCAD "{}"'.format(CSX_file))
+    from CSXCAD import AppCSXCAD_BIN
+    os.system(AppCSXCAD_BIN + ' "{}"'.format(CSX_file))
 
 
 if not post_proc_only:
diff --git a/python/Tutorials/Rect_Waveguide.py b/python/Tutorials/Rect_Waveguide.py
index 226c2e2..97cba13 100644
--- a/python/Tutorials/Rect_Waveguide.py
+++ b/python/Tutorials/Rect_Waveguide.py
@@ -88,7 +88,8 @@ if 0:  # debugging only
     if not os.path.exists(Sim_Path):
         os.mkdir(Sim_Path)
     CSX.Write2XML(CSX_file)
-    os.system(r'AppCSXCAD "{}"'.format(CSX_file))
+    from CSXCAD import AppCSXCAD_BIN
+    os.system(AppCSXCAD_BIN + ' "{}"'.format(CSX_file))
 
 if not post_proc_only:
     FDTD.Run(Sim_Path, verbose=3, cleanup=True)
diff --git a/python/Tutorials/Simple_Patch_Antenna.py b/python/Tutorials/Simple_Patch_Antenna.py
index cd80f78..564f054 100644
--- a/python/Tutorials/Simple_Patch_Antenna.py
+++ b/python/Tutorials/Simple_Patch_Antenna.py
@@ -102,7 +102,8 @@ if 0:  # debugging only
     if not os.path.exists(Sim_Path):
         os.mkdir(Sim_Path)
     CSX.Write2XML(CSX_file)
-    os.system(r'AppCSXCAD "{}"'.format(CSX_file))
+    from CSXCAD import AppCSXCAD_BIN
+    os.system(AppCSXCAD_BIN + ' "{}"'.format(CSX_file))
 
 if not post_proc_only:
     FDTD.Run(Sim_Path, verbose=3, cleanup=True)