diff --git a/oracle/src/oracleimporter.cpp b/oracle/src/oracleimporter.cpp
index 913fbc4f..40a82502 100644
--- a/oracle/src/oracleimporter.cpp
+++ b/oracle/src/oracleimporter.cpp
@@ -7,8 +7,13 @@
 OracleImporter::OracleImporter(const QString &_dataDir, QObject *parent)
 	: CardDatabase(parent), dataDir(_dataDir), setIndex(-1)
 {
-	QFile setsFile(dataDir + "/sets.xml");
-		setsFile.open(QIODevice::ReadOnly | QIODevice::Text);
+	QString fileName = dataDir + "/sets.xml";
+	QFile setsFile(fileName);
+	if (!setsFile.open(QIODevice::ReadOnly | QIODevice::Text)) {
+		QMessageBox::critical(0, tr("Error"), tr("Cannot open file '%1'.").arg(fileName));
+		return;
+	}
+
 	QXmlStreamReader xml(&setsFile);
 	QString edition;
 	QString editionLong;
diff --git a/oracle/src/window_main.cpp b/oracle/src/window_main.cpp
index 833a0766..79324c48 100644
--- a/oracle/src/window_main.cpp
+++ b/oracle/src/window_main.cpp
@@ -5,7 +5,7 @@
 WindowMain::WindowMain(QWidget *parent)
 	: QMainWindow(parent)
 {
-	importer = new OracleImporter(qApp->applicationDirPath() + "../oracle", this);
+	importer = new OracleImporter(qApp->applicationDirPath() + "/../oracle", this);
 	
 	QVBoxLayout *checkboxLayout = new QVBoxLayout;
 	QList<SetToDownload> &sets = importer->getSets();
@@ -103,4 +103,4 @@ void WindowMain::checkBoxChanged(int state)
 			sets[i].setImport(state);
 			break;
 		}
-}
\ No newline at end of file
+}