diff --git a/src/meshlab/filterthread.cpp b/src/meshlab/filterthread.cpp
index ce95c77ab..a2c0e4907 100644
--- a/src/meshlab/filterthread.cpp
+++ b/src/meshlab/filterthread.cpp
@@ -85,9 +85,14 @@ void FilterThread::run()
             EnvWrap envwrap(env);
             _cur = this;
             _success = it->filterInterface->applyFilter(_fname, _md, envwrap, &localCallBack);
+			for (MeshModel* mm = _md.nextMesh(); mm != NULL; mm = _md.nextMesh(mm))
+				vcg::tri::Allocator<CMeshO>::CompactEveryVector(mm->cm);
             _cur = NULL;
-            it->filterInterface->glContext->removePerViewRenderindData();
-            delete it->filterInterface->glContext;
+			if (it->filterInterface->glContext != NULL)
+			{
+				it->filterInterface->glContext->removePerViewRenderindData();
+				delete it->filterInterface->glContext;
+			}
         }
         else
             throw MLException("There is not yet support for not-C++ filters.");
diff --git a/src/meshlab/mainwindow_RunTime.cpp b/src/meshlab/mainwindow_RunTime.cpp
index 59a30495b..52631efe4 100644
--- a/src/meshlab/mainwindow_RunTime.cpp
+++ b/src/meshlab/mainwindow_RunTime.cpp
@@ -1820,8 +1820,6 @@ void MainWindow::executeFilter(MeshLabXMLFilterContainer* mfc,const QMap<QString
 
 void MainWindow::postFilterExecution()
 {
-	for (MeshModel* mm = meshDoc()->nextMesh(); mm != NULL; mm = meshDoc()->nextMesh(mm))
-		vcg::tri::Allocator<CMeshO>::CompactEveryVector(mm->cm);
     emit filterExecuted();
     //meshDoc()->renderState().clearState();
     qApp->restoreOverrideCursor();