diff --git a/BUGS.md b/BUGS.md
index f02e67d..73df427 100644
--- a/BUGS.md
+++ b/BUGS.md
@@ -1,7 +1,6 @@
 BUGS:
 
 - reload da página rebenta o estado.
-- barra de progresso no footer a funcionar
 - indicar o topico actual no sidebar
 - session management. close after inactive time.
 - guardar state cada vez que topico termina
@@ -17,6 +16,7 @@ TODO:
 
 SOLVED:
 
+- barra de progresso a funcionar
 - mostra tópicos do lado esquerdo, indicando quais estão feitos
 - database hardcoded in LearnApp.
 - se students.db não existe, rebenta.
diff --git a/app.py b/app.py
index 2758240..9c90a09 100644
--- a/app.py
+++ b/app.py
@@ -136,7 +136,6 @@ class LearnApp(object):
                     finishtime=str(current_question['finish_time']),
                     student_id=uid))
                 s.commit()
-            logger.debug('check_answer: saving done')
 
         return knowledge.new_question()
 
@@ -185,11 +184,13 @@ class LearnApp(object):
             fullpath = path.expanduser(path.join(prefix, n))
             if path.isdir(fullpath):
                 # if directory defaults to "prefix/questions.yaml"
-                fullpath = path.join(fullpath, "questions.yaml")
+                filename = path.join(fullpath, "questions.yaml")
+            else:
+                logger.error(f'build_dependency_graph: "{fullpath}" is not a directory')
 
-            if path.isfile(fullpath):
-                logger.info(f'Loading questions from "{fullpath}"')
-                questions = load_yaml(fullpath, default=[])
+            if path.isfile(filename):
+                logger.info(f'Loading questions from "{filename}"')
+                questions = load_yaml(filename, default=[])
                 for q in questions:
                     q['path'] = fullpath
 
diff --git a/models.py b/models.py
index bfc0bb9..910041b 100644
--- a/models.py
+++ b/models.py
@@ -15,6 +15,7 @@ class StudentTopic(Base):
     student_id = Column(String, ForeignKey('students.id'), primary_key=True)
     topic_id = Column(String, ForeignKey('topics.id'), primary_key=True)
     level = Column(Float)
+    # date  = Column(String)
 
     # ---
     student = relationship('Student', back_populates='topics')
--
libgit2 0.21.2