diff --git a/src/main/java/org/gcube/portlets/user/workspace/client/AppControllerExplorer.java b/src/main/java/org/gcube/portlets/user/workspace/client/AppControllerExplorer.java
index 8326cc4..d139bf9 100644
--- a/src/main/java/org/gcube/portlets/user/workspace/client/AppControllerExplorer.java
+++ b/src/main/java/org/gcube/portlets/user/workspace/client/AppControllerExplorer.java
@@ -6,6 +6,7 @@ import java.util.HashMap;
 import java.util.List;
 import java.util.Map;
 
+import org.gcube.common.workspacetaskexecutor.shared.FilterOperator;
 import org.gcube.portal.clientcontext.client.GCubeClientContext;
 import org.gcube.portlets.user.workspace.client.ConstantsExplorer.WS_UPLOAD_TYPE;
 import org.gcube.portlets.user.workspace.client.ConstantsExplorer.WsPortletInitOperation;
@@ -157,6 +158,7 @@ import org.gcube.portlets.widgets.workspaceuploader.client.WorkspaceUploadNotifi
 import org.gcube.portlets.widgets.workspaceuploader.client.uploader.DialogUpload.UPLOAD_TYPE;
 import org.gcube.portlets.widgets.workspaceuploader.client.uploader.MultipleDilaogUpload;
 import org.gcube.portlets.widgets.wstaskexecutor.client.WsTaskExecutorWidget;
+import org.gcube.portlets.widgets.wstaskexecutor.shared.SelectableOperator;
 import org.gcube.portlets.widgets.wstaskexecutor.shared.WSItem;
 import org.gcube.portlets.widgets.wsthreddssync.client.SyncCompletedNotification.SyncCompletedNotificationListner;
 import org.gcube.portlets.widgets.wsthreddssync.client.WsThreddsWidget;
@@ -449,8 +451,15 @@ public class AppControllerExplorer implements EventHandler, TreeAppControllerInt
 
 				if(executeDataMinerTaskEvent.getTargetFileModel()!=null){
 					WSItem wsItem = new WSItem(executeDataMinerTaskEvent.getTargetFileModel().getIdentifier(), executeDataMinerTaskEvent.getTargetFileModel().getName());
+					wsItem.setFolder(executeDataMinerTaskEvent.getTargetFileModel().isDirectory());
 					try {
-						taskExecutor.showTaskConfigurations(wsItem);
+
+						String[] filterForParameterTypes = new String[1];
+						filterForParameterTypes[0] = "FILE";
+						FilterOperator filterOperator = wsItem.isFolder()?FilterOperator.LOGICAL_NOT:FilterOperator.LOGICAL_OR;
+						SelectableOperator selectableOperator = new SelectableOperator(filterForParameterTypes, filterOperator);
+
+						taskExecutor.showTaskConfigurations(wsItem, selectableOperator);
 					}
 					catch (Exception e) {
 						Window.alert(e.getMessage());