diff --git a/src/pyconverter/xml2py/ast_tree.py b/src/pyconverter/xml2py/ast_tree.py
index 8e39ee7dc..e03496da8 100644
--- a/src/pyconverter/xml2py/ast_tree.py
+++ b/src/pyconverter/xml2py/ast_tree.py
@@ -54,7 +54,9 @@
     "Caret 40?": "",
     '``"``': "``",
     "/_nolinebreak?": "",
+    "/_nolinebreak ?": "",
     "_nolinebreak?": "",
+    "_nolinebreak ?": "",
     "nbsp": " ",
 }
 
@@ -696,7 +698,7 @@ def find(self, _type, terms=None):
         """Find the first type matching a given type string."""
         for item in self:
             if type(item).__name__ == _type:
-                if _type == "Refname" or _type == "Refnamediv":
+                if _type == "Refname":
                     if terms == None:
                         logging.error("ERROR: terms are not defined for a 'Refname' class.")
                     item.terms = terms
@@ -708,7 +710,9 @@ def find_all(self, _type, recursive=False, terms=None):
         items = []
         for item in self:
             if type(item).__name__ == _type:
-                if _type == "Refname" or _type == "Refnamediv":
+                if _type == "Refname":
+                    if not terms:
+                        logging.error("ERROR: terms are not defined for a 'Refname' class.")
                     item.terms = terms
                 items.append(item)
             elif recursive and isinstance(item, Element):
@@ -3085,7 +3089,21 @@ def arg_desc(self) -> List[Argument]:
         refsyn = self.rec_find("Refsynopsisdiv")
         # search by ID
         arguments = None
-        if refsyn is None:
+        if refsyn and "Variablelist" in refsyn.children_types:
+            for elem in refsyn:
+                if isinstance(elem, Variablelist):
+                    if arguments is None:
+                        arguments = ArgumentList(
+                            self.py_name, self.url, self._terms, elem, self.args
+                        )
+                    else:
+                        arguments += ArgumentList(
+                            self.py_name, self.url, self._terms, elem, self.args
+                        )
+                if isinstance(elem, Paragraph):
+                    self._is_paragraph_in_arg_desc = True
+
+        else:
             refsections = self.find_all("RefSection")
             for elem in refsections:
                 for child in elem:
@@ -3101,19 +3119,14 @@ def arg_desc(self) -> List[Argument]:
                     if isinstance(child, Paragraph):
                         self._is_paragraph_in_arg_desc = True
 
-        else:
-            for elem in refsyn:
-                if isinstance(elem, Variablelist):
-                    if arguments is None:
-                        arguments = ArgumentList(
-                            self.py_name, self.url, self._terms, elem, self.args
-                        )
-                    else:
-                        arguments += ArgumentList(
-                            self.py_name, self.url, self._terms, elem, self.args
-                        )
-                if isinstance(elem, Paragraph):
-                    self._is_paragraph_in_arg_desc = True
+        # Check whether arguments have been caught
+        if not arguments:
+            refnamediv = self.find("Refnamediv")
+            available_arguments = refnamediv[0].get_children_by_type("Replaceable")
+            if available_arguments:
+                arguments = ArgumentList(
+                    self.py_name, self.url, self._terms, available_arguments, self.args
+                )
 
         arg_file = Path("args.txt")