diff --git a/3d-viewer/3d_cache/3d_cache.cpp b/3d-viewer/3d_cache/3d_cache.cpp
index 8ed60b3ce2..c54e6781e9 100644
--- a/3d-viewer/3d_cache/3d_cache.cpp
+++ b/3d-viewer/3d_cache/3d_cache.cpp
@@ -195,6 +195,8 @@ S3D_CACHE::S3D_CACHE()
 
 S3D_CACHE::~S3D_CACHE()
 {
+    FlushCache();
+
     delete m_FNResolver;
     delete m_Plugins;
 }