diff --git a/docker/pre/README.rst b/docker/pre/README.rst
index de641e457..1e9334ed5 100644
--- a/docker/pre/README.rst
+++ b/docker/pre/README.rst
@@ -25,7 +25,7 @@ Prerequisites
   instructions from `this page <https://docs.docker.com/engine/install/>`_.
 
 * Download the latest Linux release artifacts for the ``pre`` Docker container:
-  `linux-binaries.zip <https://github.com/ansys/pydyna/releases/download/v0.3.5/linux-binaries.zip>`_.
+  `linux-binaries.zip <https://github.com/ansys/pydyna/releases/download/v0.4.2/linux-binaries.zip>`_.
 
 * Move this ZIP file to the ``docker/pre`` directory.
 
diff --git a/src/ansys/dyna/core/pre/dynabase.py b/src/ansys/dyna/core/pre/dynabase.py
index c97c8ad53..55dca7f4a 100644
--- a/src/ansys/dyna/core/pre/dynabase.py
+++ b/src/ansys/dyna/core/pre/dynabase.py
@@ -20,6 +20,11 @@ class Motion(Enum):
     DISPLACEMENT = 2
 
 
+class RWMotion(Enum):
+    VELOCITY = 0
+    DISPLACEMENT = 1
+
+
 class DOF(Enum):
     X_TRANSLATIONAL = 1
     Y_TRANSLATIONAL = 2
@@ -2528,13 +2533,11 @@ def __init__(self, tail=Point(0, 0, 0), head=Point(0, 0, 0), radius=1, length=10
         self.lcid = 0
         self.dir = Direction(1, 0, 0)
 
-    def set_motion(self, curve, motion=Motion.VELOCITY, dir=Direction(1, 0, 0)):
+    def set_motion(self, curve, motion=RWMotion.VELOCITY, dir=Direction(1, 0, 0)):
         """Set the prescribed motion."""
         curve.create(self.stub)
         self.lcid = curve.id
         self.motion = motion.value
-        if self.motion == Motion.DISPLACEMENT:
-            self.motion = 1
         self.dir = dir
 
     def create(self):
@@ -2589,13 +2592,11 @@ def __init__(self, center=Point(0, 0, 0), orient=Point(0, 0, 0), radius=1):
         self.lcid = 0
         self.dir = Direction(1, 0, 0)
 
-    def set_motion(self, curve, motion=Motion.VELOCITY, dir=Direction(1, 0, 0)):
+    def set_motion(self, curve, motion=RWMotion.VELOCITY, dir=Direction(1, 0, 0)):
         """Set the prescribed motion."""
         curve.create(self.stub)
         self.lcid = curve.id
         self.motion = motion.value
-        if self.motion == Motion.DISPLACEMENT:
-            self.motion = 1
         self.dir = dir
 
     def create(self):
diff --git a/src/ansys/dyna/core/pre/dynaem.py b/src/ansys/dyna/core/pre/dynaem.py
index 63b405e2b..3ce911995 100644
--- a/src/ansys/dyna/core/pre/dynaem.py
+++ b/src/ansys/dyna/core/pre/dynaem.py
@@ -808,9 +808,11 @@ def create(self):
         """Set parameter for Randles Cell."""
         if self.define_batmac:
             sid = 0
+            soutouid = 0
             if self.psid is not None:
                 sid = self.psid.create(self.stub)
-            soctou = self.soctou.create(self.stub)
+            if self.soctou is not None:
+                soutouid = self.soctou.create(self.stub)
             modified_prm = []
             for par in self.prm:
                 if type(par) == float:
@@ -826,7 +828,7 @@ def create(self):
                     q=self.q,
                     cq=self.cq,
                     socinit=self.socinit,
-                    soctou=soctou,
+                    soctou=soutouid,
                     chargedirparam=modified_prm,
                     temp=self.temp,
                     frther=self.frther,