diff -r 6da867fa5429 -r 3387a84ddaba src/documentmanager.cpp
--- a/src/documentmanager.cpp	Sun Jan 19 02:54:48 2020 +0200
+++ b/src/documentmanager.cpp	Sun Jan 19 13:53:07 2020 +0200
@@ -97,12 +97,13 @@
 
 void DocumentManager::loadDependenciesForModel(
 	const QString& modelName,
+	const QString& path,
 	const LibraryManager& libraries,
 	QTextStream& errorStream)
 {
 	QStringList missing;
 	QStringList processed;
-	loadDependenciesForModel(modelName, libraries, missing, processed, errorStream);
+	loadDependenciesForModel(modelName, path, libraries, missing, processed, errorStream);
 	if (not missing.empty())
 	{
 		missing.sort(Qt::CaseInsensitive);
@@ -112,8 +113,23 @@
 	}
 }
 
+static QString findFile(QString referenceName, const QString& path, const LibraryManager& libraries)
+{
+	// Try to find the file in the same place as the model itself
+	referenceName.replace("\\", "/");
+	const QDir dir = QFileInfo{path}.dir();
+	QString referencedFilePath = dir.filePath(referenceName);
+	if (not QFileInfo{referencedFilePath}.exists())
+	{
+		// Look for it in the libraries
+		referencedFilePath = libraries.findFile(referenceName);
+	}
+	return referencedFilePath;
+}
+
 void DocumentManager::loadDependenciesForModel(
 	const QString& modelName,
+	const QString &path,
 	const LibraryManager& libraries,
 	QStringList& missing,
 	QStringList& processed,
@@ -134,24 +150,24 @@
 		{
 			try
 			{
-				const QString path = libraries.findFile(referenceName);
-				if (path.isEmpty())
+				const QString referencedFilePath = findFile(referenceName, path, libraries);
+				if (referencedFilePath.isEmpty())
 				{
 					throw LoadingError{utility::format("'%1' was not found.", referenceName)};
 				}
 				QString errorString;
 				QTextStream localErrorStream{&errorString};
-				QString resultName = this->openModel(path, localErrorStream);
+				QString resultName = this->openModel(referencedFilePath, localErrorStream);
 				if (resultName.isEmpty())
 				{
 					throw LoadingError{utility::format(
 						"could not load '%1': %2",
-						path,
+						referencedFilePath,
 						errorString)};
 				}
 				if (not processed.contains(referenceName))
 				{
-					loadDependenciesForModel(referenceName, libraries, missing, processed, errorStream);
+					loadDependenciesForModel(referenceName, path, libraries, missing, processed, errorStream);
 				}
 			}
 			catch(const LoadingError& error)