diff --git a/org.adempiere.ui.zk/WEB-INF/src/org/adempiere/webui/editor/WTableDirEditor.java b/org.adempiere.ui.zk/WEB-INF/src/org/adempiere/webui/editor/WTableDirEditor.java
index a84906432f..7662e40312 100644
--- a/org.adempiere.ui.zk/WEB-INF/src/org/adempiere/webui/editor/WTableDirEditor.java
+++ b/org.adempiere.ui.zk/WEB-INF/src/org/adempiere/webui/editor/WTableDirEditor.java
@@ -216,8 +216,11 @@ ContextMenuListener, IZoomableEditor
 	private void createCacheListener() {
 		if (lookup != null) {
 			String columnName = lookup.getColumnName();
-			String tableName = columnName.substring(0, columnName.indexOf("."));
-			tableCacheListener = new CCacheListener(tableName, this);
+			int dotIndex = columnName.indexOf(".");
+			if (dotIndex > 0) {
+				String tableName = columnName.substring(0, dotIndex);
+				tableCacheListener = new CCacheListener(tableName, this);
+			}
 		}
 	}