diff --git a/orienteer-core/src/main/java/org/orienteer/core/module/PerspectivesModule.java b/orienteer-core/src/main/java/org/orienteer/core/module/PerspectivesModule.java
index c946ea7f..27b47136 100644
--- a/orienteer-core/src/main/java/org/orienteer/core/module/PerspectivesModule.java
+++ b/orienteer-core/src/main/java/org/orienteer/core/module/PerspectivesModule.java
@@ -219,16 +219,17 @@ public ODocument getDefaultPerspective(OSecurityUser user) {
 	}
 	
 	public ODocument getPerspectiveForORole(OSecurityRole role) {
-		if (role == null) {
+		ODocument roleDoc = role.getDocument();
+		if (roleDoc==null) {
 			return null;
 		}
 
-		if (role.getDocument().field(PROP_PERSPECTIVE) != null) {
-			return ((OIdentifiable) role.getDocument().field(PROP_PERSPECTIVE)).getRecord();
+		if (roleDoc.field(PROP_PERSPECTIVE) != null) {
+			return ((OIdentifiable) roleDoc.field(PROP_PERSPECTIVE)).getRecord();
 		}
 
 		OSecurityRole parentRole = role.getParentRole();
-		return parentRole != null && !parentRole.equals(role) ? getPerspectiveForORole(role) : null;
+		return parentRole != null && !parentRole.equals(role) ? getPerspectiveForORole(parentRole) : null;
 	}
 
 	public void updateUserPerspective(ODocument user, ODocument perspective) {
diff --git a/orienteer-core/src/main/java/org/orienteer/core/module/TaskManagerModule.java b/orienteer-core/src/main/java/org/orienteer/core/module/TaskManagerModule.java
index 97aa01e0..88efbe00 100644
--- a/orienteer-core/src/main/java/org/orienteer/core/module/TaskManagerModule.java
+++ b/orienteer-core/src/main/java/org/orienteer/core/module/TaskManagerModule.java
@@ -11,6 +11,8 @@
 import org.orienteer.core.util.OSchemaHelper;
 
 import com.orientechnologies.orient.core.db.ODatabaseSession;
+import com.orientechnologies.orient.core.metadata.schema.OClass;
+import com.orientechnologies.orient.core.metadata.schema.OProperty;
 import com.orientechnologies.orient.core.metadata.schema.OSchema;
 import com.orientechnologies.orient.core.metadata.schema.OType;
 import com.orientechnologies.orient.core.record.impl.ODocument;
@@ -22,7 +24,7 @@
 public class TaskManagerModule extends AbstractOrienteerModule {
 	
     public static final String NAME = "task-manager";
-    public static final int VERSION = 3;
+    public static final int VERSION = 4;
     
     TaskManagerModule(){
     	super(NAME, VERSION);
@@ -44,5 +46,15 @@ public void onUpdate(OrienteerWebApplication app, ODatabaseSession db,
 			if(schema.getClass("OConsoleTaskSession")!=null) schema.dropClass("OConsoleTaskSession");
 		}
 		onInstall(app, db);
+		if(oldVersion<=4) {
+			OSchema schema = db.getMetadata().getSchema();
+			OClass taskSessionClass = schema.getClass(IOTaskSessionPersisted.CLASS_NAME);
+			OProperty toDelete = taskSessionClass.getProperty("isStopable");
+			OProperty toKeep = taskSessionClass.getProperty("stopable");
+			if(toDelete!=null && toKeep!=null) {
+				db.execute("sql", "update "+IOTaskSessionPersisted.CLASS_NAME+" set stopable = isStopable").close();
+				taskSessionClass.dropProperty("isStopable");
+			}
+		}
 	}
 }
diff --git a/orienteer-core/src/main/java/org/orienteer/core/tasks/IOTaskSessionPersisted.java b/orienteer-core/src/main/java/org/orienteer/core/tasks/IOTaskSessionPersisted.java
index b7789d63..02b6992d 100644
--- a/orienteer-core/src/main/java/org/orienteer/core/tasks/IOTaskSessionPersisted.java
+++ b/orienteer-core/src/main/java/org/orienteer/core/tasks/IOTaskSessionPersisted.java
@@ -83,7 +83,6 @@ public interface IOTaskSessionPersisted extends ITaskSession, IODocumentWrapper
 	@OrientDBProperty(notNull = false)
 	public IOTaskSessionPersisted setFinalProgress(double value);
 	
-	@EntityProperty("isStoppable")
 	@OrientDBProperty(notNull = false)
 	@DefaultValue("false")
 	public boolean isStopable();
@@ -115,7 +114,7 @@ public default IOTaskSessionPersisted appendOutput(String add) {
 	
 	public default IOTaskSessionPersisted appendError(String add) {
 		String error = getError();
-		setOutput(error!=null?error+"\n"+add:add);
+		setError(error!=null?error+"\n"+add:add);
 		return this;
 	}