diff --git a/base/src/org/compiere/model/DataStatusEvent.java b/base/src/org/compiere/model/DataStatusEvent.java
index cb708fe8cc..53573c93a8 100644
--- a/base/src/org/compiere/model/DataStatusEvent.java
+++ b/base/src/org/compiere/model/DataStatusEvent.java
@@ -63,7 +63,7 @@ public final class DataStatusEvent extends EventObject implements Serializable
 	private int				m_loadedRows = -1;
 	private int				m_currentRow = -1;
 	//
-	private int				m_changedColumn = 0;
+	private int				m_changedColumn = -1;
 	private String			m_columnName = null;
 	
 	/** Created 				*/
diff --git a/base/src/org/compiere/model/GridTab.java b/base/src/org/compiere/model/GridTab.java
index 41d1fb9295..2ef7c27e8b 100644
--- a/base/src/org/compiere/model/GridTab.java
+++ b/base/src/org/compiere/model/GridTab.java
@@ -2182,7 +2182,7 @@ public class GridTab implements DataStatusListener, Evaluatee, Serializable
 	 */
 	public GridField getField (int index)
 	{
-		return m_mTable.getField(index);
+		return (index >= 0 ? m_mTable.getField(index) : null);
 	}   //  getField
 
 	/**