diff --git a/pubs/commands/add_cmd.py b/pubs/commands/add_cmd.py
index 8800b7a..56765b4 100644
--- a/pubs/commands/add_cmd.py
+++ b/pubs/commands/add_cmd.py
@@ -100,12 +100,16 @@ def command(args):
         ui.warning(('Skipping document file from bib file '
                     '{}, using {} instead.').format(bib_docfile, docfile))
 
+    docfile = docfile
+
     if docfile is not None:
         copy_doc = args.copy
         if copy_doc is None:
             copy_doc = config().import_copy
         if copy_doc:
             docfile = rp.databroker.add_doc(citekey, docfile)
+        else:
+            raise NotImplementedError
 
     # create the paper
 
diff --git a/pubs/content.py b/pubs/content.py
index bc33c4f..18f8c50 100644
--- a/pubs/content.py
+++ b/pubs/content.py
@@ -39,6 +39,10 @@ def _check_system_path_is(nature, path, fail=True):
         return answer
 
 
+def system_path(path):
+    return os.path.abspath(os.path.expanduser(path))
+
+
 def check_file(path, fail=True):
     syspath = system_path(path)
     return (_check_system_path_exists(syspath, fail=fail)
@@ -64,10 +68,6 @@ def write_file(filepath, data):
         f.write(data)
 
 
-def system_path(path):
-    return os.path.abspath(os.path.expanduser(path))
-
-
 # dealing with formatless content
 
 def content_type(path):
@@ -117,7 +117,9 @@ def get_content(path, ui=None):
         return read_file(path)
 
 
-def move_content(source, target, overwrite = False):
+def move_content(source, target, overwrite=False):
+    source = system_path(source)
+    target = system_path(target)
     if source == target:
         return
     if not overwrite and os.path.exists(target):
@@ -126,6 +128,8 @@ def move_content(source, target, overwrite = False):
 
 
 def copy_content(source, target, overwrite=False):
+    source = system_path(source)
+    target = system_path(target)
     if source == target:
         return
     if not overwrite and os.path.exists(target):
diff --git a/pubs/filebroker.py b/pubs/filebroker.py
index 29faea2..53bdb75 100644
--- a/pubs/filebroker.py
+++ b/pubs/filebroker.py
@@ -145,8 +145,6 @@ class DocBroker(object):
                 docpath = os.path.join(self.docdir, parsed.netloc)
             else:
                 docpath = os.path.join(self.docdir, parsed.netloc, parsed.path[1:])
-        elif content_type(docpath) != 'file':
-            return docpath
         return docpath
 
     def add_doc(self, citekey, source_path, overwrite=False):