diff --git a/org.talend.core.repository/src/main/java/org/talend/repository/model/ProjectRepositoryNode.java b/org.talend.core.repository/src/main/java/org/talend/repository/model/ProjectRepositoryNode.java
index 42a846dbf2..3a5ef4ff8b 100644
--- a/org.talend.core.repository/src/main/java/org/talend/repository/model/ProjectRepositoryNode.java
+++ b/org.talend.core.repository/src/main/java/org/talend/repository/model/ProjectRepositoryNode.java
@@ -1813,7 +1813,7 @@ public class ProjectRepositoryNode extends RepositoryNode implements IProjectRep
     }
 
     public boolean getMergeRefProject() {
-        IPreferenceStore preferenceStore = RepositoryManager.getPreferenceStore();
+        IPreferenceStore preferenceStore = RepositoryManager.getRepositoryPreferenceStore();
         return preferenceStore.getBoolean(IRepositoryPrefConstants.MERGE_REFERENCE_PROJECT);
     }
 
diff --git a/org.talend.core.runtime/src/main/java/org/talend/core/model/repository/RepositoryManager.java b/org.talend.core.runtime/src/main/java/org/talend/core/model/repository/RepositoryManager.java
index 5eb7fe07ef..ce1881fa2e 100644
--- a/org.talend.core.runtime/src/main/java/org/talend/core/model/repository/RepositoryManager.java
+++ b/org.talend.core.runtime/src/main/java/org/talend/core/model/repository/RepositoryManager.java
@@ -50,6 +50,16 @@ public final class RepositoryManager {
         return CoreRuntimePlugin.getInstance().getDesignerCoreService().getDesignerCorePreferenceStore();
     }
 
+    /**
+     * 
+     * DOC wchen DesignerCorePreference disappear in some case ,so i change to use repository preference store.
+     * 
+     * @return
+     */
+    public static IPreferenceStore getRepositoryPreferenceStore() {
+        return CoreRuntimePlugin.getInstance().getRepositoryService().getRepositoryPreferenceStore();
+    }
+
     public static boolean isRefreshManually() {
         return getPreferenceStore().getBoolean(IRepositoryPrefConstants.MANUALLY_REFRESH);
     }
diff --git a/org.talend.repository.view/src/org/talend/repository/viewer/content/ProjectRepoAbstractContentProvider.java b/org.talend.repository.view/src/org/talend/repository/viewer/content/ProjectRepoAbstractContentProvider.java
index 996da80aef..2b377f3f14 100644
--- a/org.talend.repository.view/src/org/talend/repository/viewer/content/ProjectRepoAbstractContentProvider.java
+++ b/org.talend.repository.view/src/org/talend/repository/viewer/content/ProjectRepoAbstractContentProvider.java
@@ -190,7 +190,7 @@ public abstract class ProjectRepoAbstractContentProvider extends FolderListenerS
             };
             // the merge only for DI repository,need to judge null for other product
             if (CoreRuntimePlugin.getInstance().getDesignerCoreService() != null) {
-                IPreferenceStore preferenceStore = RepositoryManager.getPreferenceStore();
+                IPreferenceStore preferenceStore = RepositoryManager.getRepositoryPreferenceStore();
                 preferenceStore.addPropertyChangeListener(mergeRefListener);
             }