diff --git a/patacrep/build.py b/patacrep/build.py
index 059143d7..53cb0d34 100644
--- a/patacrep/build.py
+++ b/patacrep/build.py
@@ -135,7 +135,9 @@ class Songbook:
     def iter_errors(self):
         """Iterate over errors of book and book content."""
         yield from self._errors
-        for item in self._config.get('content', list()):
+        content = self._config.get('content', list())
+        yield from content.iter_errors()
+        for item in content:
             if not hasattr(item, "iter_errors"):
                 continue
             yield from item.iter_errors()
diff --git a/patacrep/content/__init__.py b/patacrep/content/__init__.py
index 6ecb93db..6d00689b 100755
--- a/patacrep/content/__init__.py
+++ b/patacrep/content/__init__.py
@@ -73,7 +73,7 @@ import re
 import sys
 
 from patacrep import files
-from patacrep.errors import SongbookError
+from patacrep.errors import SharedError
 
 LOGGER = logging.getLogger(__name__)
 EOL = '\n'
@@ -120,7 +120,7 @@ class ContentItem:
         """Return the string to end a block."""
         return ""
 
-class ContentError(SongbookError):
+class ContentError(SharedError):
     """Error in a content plugin."""
     def __init__(self, keyword=None, message=None):
         super(ContentError, self).__init__()
@@ -140,13 +140,15 @@ class ContentList:
 
     def __init__(self, *args, **kwargs):
         self._content = list(*args, **kwargs)
-        self.errors = []
+        self._errors = []
 
     def __iter__(self):
         yield from self._content
 
     def extend(self, iterator):
-        return self._content.extend(iterator)
+        self._content.extend(iterator)
+        if isinstance(iterator, self.__class__):
+            self._errors.extend(iterator._errors)
 
     def append(self, item):
         return self._content.append(item)
@@ -154,6 +156,23 @@ class ContentList:
     def __len__(self):
         return len(self._content)
 
+    def append_error(self, error):
+        LOGGER.warning(error)
+        self._errors.append(error)
+
+    def extend_error(self, errors):
+        for error in errors:
+            self.append_error(error)
+
+    def iter_errors(self):
+        yield from self._errors
+
+class EmptyContentList(ContentList):
+    def __init__(self, *, errors):
+        super().__init__()
+        for error in errors:
+            self.append_error(error)
+
 @jinja2.contextfunction
 def render(context, content):
     """Render the content of the songbook as a LaTeX code.
@@ -209,11 +228,11 @@ def process_content(content, config=None):
         try:
             match = keyword_re.match(elem[0]).groupdict()
         except AttributeError:
-            contentlist.errors.append(ContentError(elem[0], "Cannot parse content type."))
+            contentlist.append_error(ContentError(elem[0], "Cannot parse content type."))
             continue
         (keyword, argument) = (match['keyword'], match['argument'])
         if keyword not in plugins:
-            contentlist.errors.append(ContentError(keyword, "Unknown content type."))
+            contentlist.append_error(ContentError(keyword, "Unknown content type."))
             continue
         contentlist.extend(plugins[keyword](
             keyword,
diff --git a/patacrep/content/include.py b/patacrep/content/include.py
index 7c553cdb..a972d5bf 100644
--- a/patacrep/content/include.py
+++ b/patacrep/content/include.py
@@ -9,7 +9,7 @@ import os
 import sys
 import logging
 
-from patacrep.content import process_content, ContentError
+from patacrep.content import process_content, ContentError, ContentList
 from patacrep import encoding, errors, files
 
 LOGGER = logging.getLogger(__name__)
@@ -38,10 +38,14 @@ def parse(keyword, config, argument, contentlist):
         - argument: None;
         - contentlist: a list of file paths to be included.
     """
-    new_contentlist = []
+    new_contentlist = ContentList()
 
     for path in contentlist:
-        filepath = load_from_datadirs(path, config.get('datadir', []))
+        try:
+            filepath = load_from_datadirs(path, config.get('datadir', []))
+        except ContentError as error:
+            new_contentlist.append_error(error)
+            continue
         content_file = None
         try:
             with encoding.open_read(
@@ -50,12 +54,14 @@ def parse(keyword, config, argument, contentlist):
                 ) as content_file:
                 new_content = json.load(content_file)
         except Exception as error: # pylint: disable=broad-except
-            LOGGER.warning(error)
-            LOGGER.warning("Error while loading file '{}'.".format(filepath))
-            sys.exit(1)
+            new_contentlist.append_error(ContentError(
+                keyword="include",
+                message="Error while loading file '{}': {}".format(filepath, error),
+                ))
+            continue
 
         config["datadir"].append(os.path.abspath(os.path.dirname(filepath)))
-        new_contentlist += process_content(new_content, config)
+        new_contentlist.extend(process_content(new_content, config))
         config["datadir"].pop()
 
     return new_contentlist
diff --git a/patacrep/content/section.py b/patacrep/content/section.py
index 250d514c..fe5cd0b1 100755
--- a/patacrep/content/section.py
+++ b/patacrep/content/section.py
@@ -1,6 +1,6 @@
 """Allow LaTeX sections (starred or not) as content of a songbook."""
 
-from patacrep.content import ContentItem, ContentError
+from patacrep.content import ContentItem, ContentError, ContentList, EmptyContentList
 
 KEYWORDS = [
     "part",
@@ -41,14 +41,17 @@ def parse(keyword, argument, contentlist, config):
       and long) of the section;
     - config: configuration dictionary of the current songbook.
     """
-    if (keyword not in KEYWORDS) and (len(contentlist) != 1):
-        raise ContentError(
-            keyword,
-            "Starred section names must have exactly one argument."
-            )
-    if (len(contentlist) not in [1, 2]):
-        raise ContentError(keyword, "Section can have one or two arguments.")
-    return ContentList(Section(keyword, *contentlist))
+    try:
+        if (keyword not in KEYWORDS) and (len(contentlist) != 1):
+            raise ContentError(
+                keyword,
+                "Starred section names must have exactly one argument."
+                )
+        if (len(contentlist) not in [1, 2]):
+            raise ContentError(keyword, "Section can have one or two arguments.")
+        return ContentList([Section(keyword, *contentlist)])
+    except ContentError as error:
+        return EmptyContentList(errors=[error])
 
 
 CONTENT_PLUGINS = dict([
diff --git a/patacrep/content/song.py b/patacrep/content/song.py
index 5b3196a5..fe2297b2 100755
--- a/patacrep/content/song.py
+++ b/patacrep/content/song.py
@@ -87,14 +87,13 @@ def parse(keyword, argument, contentlist, config):
                     LOGGER.debug('Parsing file "{}"…'.format(filename))
                     extension = filename.split(".")[-1]
                     if extension not in plugins:
-                        LOGGER.warning(
-                            (
+                        songlist.append_error(ContentError(message=(
                                 'I do not know how to parse "{}": name does '
                                 'not end with one of {}. Ignored.'
                             ).format(
                                 os.path.join(songdir.datadir, filename),
                                 ", ".join(["'.{}'".format(key) for key in plugins.keys()]),
-                                ))
+                                )))
                         continue
                     try:
                         renderer = SongRenderer(plugins[extension](
@@ -103,8 +102,7 @@ def parse(keyword, argument, contentlist, config):
                             datadir=songdir.datadir,
                             ))
                     except ContentError as error:
-                        # TODO
-                        songlist.errors.append(error)
+                        songlist.append_error(error)
                         continue
                     songlist.append(renderer)
                     config["_langs"].add(renderer.song.lang)
diff --git a/patacrep/content/songsection.py b/patacrep/content/songsection.py
index 5805939c..2a5ba2d5 100755
--- a/patacrep/content/songsection.py
+++ b/patacrep/content/songsection.py
@@ -1,6 +1,6 @@
 """Allow 'songchapter' and 'songsection' as content of a songbook."""
 
-from patacrep.content import ContentItem, ContentError
+from patacrep.content import ContentItem, ContentError, ContentList, EmptyContentList
 
 KEYWORDS = [
     "songchapter",
@@ -29,12 +29,15 @@ def parse(keyword, argument, contentlist, config):
     - contentlist: a list of one string, which is the name of the section;
     - config: configuration dictionary of the current songbook.
     """
-    if (keyword not in KEYWORDS) and (len(contentlist) != 1):
-        raise ContentError(
-            keyword,
-            "Starred section names must have exactly one argument.",
-            )
-    return ContentList(SongSection(keyword, contentlist[0]))
+    try:
+        if (keyword not in KEYWORDS) and (len(contentlist) != 1):
+            raise ContentError(
+                keyword,
+                "Starred section names must have exactly one argument.",
+                )
+        return ContentList([SongSection(keyword, contentlist[0])])
+    except ContentError as error:
+        return EmptyContentList(errors=[error])
 
 
 CONTENT_PLUGINS = dict([
diff --git a/patacrep/content/sorted.py b/patacrep/content/sorted.py
index 4fac210d..41052770 100755
--- a/patacrep/content/sorted.py
+++ b/patacrep/content/sorted.py
@@ -9,7 +9,7 @@ import logging
 import unidecode
 
 from patacrep import files
-from patacrep.content import ContentError
+from patacrep.content import ContentError, ContentList
 from patacrep.content.song import OnlySongsError, process_songs
 
 LOGGER = logging.getLogger(__name__)
@@ -85,11 +85,11 @@ def parse(keyword, config, argument, contentlist):
     try:
         songlist = process_songs(contentlist, config)
     except OnlySongsError as error:
-        raise ContentError(keyword, (
+        return EmptyContentError(errors=[ContentError(keyword, (
             "Content list of this keyword can be only songs (or content "
             "that result into songs), and the following are not:" +
             str(error.not_songs)
-            ))
+            ))])
     return sorted(songlist, key=key_generator(sort))
 
 CONTENT_PLUGINS = {'sorted': parse}
diff --git a/patacrep/content/tex.py b/patacrep/content/tex.py
index b0d4395b..efacb838 100755
--- a/patacrep/content/tex.py
+++ b/patacrep/content/tex.py
@@ -5,7 +5,7 @@ import logging
 import os
 
 from patacrep import files, errors
-from patacrep.content import ContentItem, ContentList
+from patacrep.content import ContentItem, ContentList, ContentError
 
 LOGGER = logging.getLogger(__name__)
 
@@ -35,7 +35,7 @@ def parse(keyword, argument, contentlist, config):
         LOGGER.warning(
             "Useless 'tex' content: list of files to include is empty."
             )
-    filelist = ContentList
+    filelist = ContentList()
     basefolders = itertools.chain(
         (path.fullpath for path in config['_songdir']),
         files.iter_datadirs(config['datadir']),
@@ -51,9 +51,9 @@ def parse(keyword, argument, contentlist, config):
                     ))
                 break
         if not checked_file:
-            LOGGER.warning(
-                "{} Compilation may fail later.".format(
-                    errors.notfound(filename, basefolders)
+            filelist.append_error(ContentError(
+                keyword="tex",
+                message=errors.notfound(filename, basefolders),
                 )
             )
             continue
diff --git a/patacrep/latex/syntax.py b/patacrep/latex/syntax.py
index 2814b0ad..992c33a1 100644
--- a/patacrep/latex/syntax.py
+++ b/patacrep/latex/syntax.py
@@ -131,13 +131,15 @@ class LatexParser(Parser):
         """dictionary : identifier EQUAL braces dictionary_next
                       | identifier EQUAL error dictionary_next
         """
+        symbols[0] = {}
         if isinstance(symbols[3], ast.Expression):
-            symbols[0] = {}
             symbols[0][symbols[1]] = symbols[3]
             symbols[0].update(symbols[4])
         else:
-            # TODO put error in self.errors
-            raise ParsingError("Do enclose arguments between braces.")
+            self.error(
+                line=symbols.lexer.lineno,
+                message="Argument '{}' should be enclosed between braces.".format(symbols[1]),
+                )
 
     @staticmethod
     def p_identifier(symbols):