diff --git a/designer-base/src/main/java/com/fr/design/mainframe/loghandler/LogMessageBar.java b/designer-base/src/main/java/com/fr/design/mainframe/loghandler/LogMessageBar.java
index 6209152433..bf815e1d74 100644
--- a/designer-base/src/main/java/com/fr/design/mainframe/loghandler/LogMessageBar.java
+++ b/designer-base/src/main/java/com/fr/design/mainframe/loghandler/LogMessageBar.java
@@ -73,5 +73,6 @@ public class LogMessageBar extends JPanel {
 		if (dlg != null) {
 			dlg.dispose();
 		}
+		THIS = null;
 	}
 }
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