diff --git a/cli/lmi/shell/LMIMethod.py b/cli/lmi/shell/LMIMethod.py
index a658e8c..f6ea0d 100644
--- a/cli/lmi/shell/LMIMethod.py
+++ b/cli/lmi/shell/LMIMethod.py
@@ -41,7 +41,7 @@ from LMIJob import JOB_FINISH_EARLY
 
 from LMIUtil import LMIPassByRef
 from LMIUtil import lmi_raise_or_dump_exception
-from LMIUtil import lmi_cast_to_cim
+from LMIUtil import lmi_transform_to_cim_param
 from LMIUtil import lmi_transform_to_lmi
 
 from LMIExceptions import LMIIndicationListenerError
@@ -476,12 +476,9 @@ class LMIMethod(LMIWrapperBaseObject):
         method_args.update(kwargs)
         for (param, value) in method_args.iteritems():
             if param in self._method.parameters:
-                if isinstance(value, LMIObjectFactory().LMIInstanceName):
-                    value = value.wrapped_object
-                elif isinstance(value, LMIObjectFactory().LMIInstance):
-                    value = value.wrapped_object.path
+                # Cast input parameters into acceptable CIM types
                 t = self._method.parameters[param].type
-                method_args[param] = lmi_cast_to_cim(t, value)
+                method_args[param] = lmi_transform_to_cim_param(t, value)
             else:
                 # NOTE: maybe we could check for pywbem type and not to exit prematurely
                 errorstr = "Unknown parameter '%s' supplied for method '%s'" % (param, self._method.name)
diff --git a/cli/lmi/shell/LMIUtil.py b/cli/lmi/shell/LMIUtil.py
index c117fcab557e8ee65995cebdec1dcceec1b12f2a..69cbf75fdf73d57d3b6e5067edf72100962b6df7 100644
--- a/cli/lmi/shell/LMIUtil.py
+++ b/cli/lmi/shell/LMIUtil.py
@@ -276,6 +276,32 @@ def lmi_transform_to_lmi(conn, value):
         return tuple(map(lambda val: lmi_transform_to_lmi(conn, val), value))
     return value
 
+def lmi_transform_to_cim_param(t, value):
+    """
+    Helper function for method calls, which transforms input object into
+    :py:class:`CIMInstanceName` object. Members if lists, dictionaries and tuples are
+    transformed as well. The function does not cast numeric types.
+
+    :param string t: string of CIM type
+    :param value: object to be transformed to :py:mod:`pywbem` type.
+    :returns: transformed LMIShell's object into :py:mod:`pywbem` one
+    """
+    if isinstance(value, LMIObjectFactory().LMIInstance):
+        return value.wrapped_object.path
+    elif isinstance(value, LMIObjectFactory().LMIInstanceName):
+        return value.wrapped_object
+    elif isinstance(value, (int, float)):
+        return lmi_cast_to_cim(t, value)
+    elif isinstance(value, (dict, pywbem.NocaseDict)):
+        return pywbem.NocaseDict({
+                k: lmi_transform_to_cim_param(t, val)
+            for k, val in value.iteritems()})
+    elif isinstance(value, list):
+        return map(lambda val: lmi_transform_to_cim_param(t, val), value)
+    elif isinstance(value, tuple):
+        return tuple(map(lambda val: lmi_transform_to_cim_param(t, val), value))
+    return value
+
 def lmi_isinstance(lmi_obj, lmi_class):
     """
     Function returns True if :samp:`lmi_obj` is an instance of a :samp:`lmi_class`, False