diff --git a/src/meshlabplugins/filter_plymc/filter_plymc.cpp b/src/meshlabplugins/filter_plymc/filter_plymc.cpp
index a9abaefbb..910966920 100644
--- a/src/meshlabplugins/filter_plymc/filter_plymc.cpp
+++ b/src/meshlabplugins/filter_plymc/filter_plymc.cpp
@@ -121,6 +121,14 @@ bool PlyMCPlugin::applyFilter(QAction *filter, MeshDocument &md, RichParameterSe
     {
     srand(time(NULL));
 
+	//check if folder is writable
+	QFileInfo fi(QDir::currentPath(),"file.tmp");
+	if (!fi.isWritable())
+	{
+		Log("ERROR - current folder is not writable. VCG Merging need to save intermediate files in the current working folder. Project and meshes must be in a write-enabled folder");
+		return false;
+	}
+
     tri::PlyMC<SMesh,SimpleMeshProvider<SMesh> > pmc;
     pmc.MP.setCacheSize(64);
     tri::PlyMC<SMesh,SimpleMeshProvider<SMesh> >::Parameter &p = pmc.p;
diff --git a/src/meshlabplugins/filter_screened_poisson/filter_screened_poisson.cpp b/src/meshlabplugins/filter_screened_poisson/filter_screened_poisson.cpp
index 42d969fb7..85cc91597 100644
--- a/src/meshlabplugins/filter_screened_poisson/filter_screened_poisson.cpp
+++ b/src/meshlabplugins/filter_screened_poisson/filter_screened_poisson.cpp
@@ -581,6 +581,14 @@ bool FilterScreenedPoissonPlugin::applyFilter( const QString& filterName,MeshDoc
 {
   if (filterName == "Surface Reconstruction: Screened Poisson")
   {
+	//check if folder is writable
+	QFileInfo fi(QDir::currentPath(), "file.tmp");
+	if (!fi.isWritable())
+	{
+		Log("ERROR - current folder is not writable. VCG Merging need to save intermediate files in the current working folder. Project and meshes must be in a write-enabled folder");
+		return false;
+	}
+
     PoissonParam<Scalarm> pp;
     pp.MaxDepthVal = env.evalInt("depth");
     pp.FullDepthVal = env.evalInt("fullDepth");