diff --git a/rse/plugins/org.eclipse.dstore.core/src/org/eclipse/dstore/core/model/DataElement.java b/rse/plugins/org.eclipse.dstore.core/src/org/eclipse/dstore/core/model/DataElement.java
index 61d2778e2d2..2cfff460e9e 100644
--- a/rse/plugins/org.eclipse.dstore.core/src/org/eclipse/dstore/core/model/DataElement.java
+++ b/rse/plugins/org.eclipse.dstore.core/src/org/eclipse/dstore/core/model/DataElement.java
@@ -14,6 +14,7 @@
  * Contributors:
  * David McKnight   (IBM) - [226561] [apidoc] Add API markup to RSE Javadocs where extend / implement is allowed
  * David McKnight    (IBM)  - [373507] [dstore][multithread] reduce heap memory on disconnect for server
+ * David McKnight   (IBM) - [380158] [dstore] DataStore.command() fails when multiple commands issue simultaneously
  *******************************************************************************/
 
 package org.eclipse.dstore.core.model;
@@ -588,20 +589,19 @@ public final class DataElement implements IDataElement
 	 */
 	public DataElement get(int index)
 	{
-		if (_nestedData == null)
-		{
+		if (_nestedData == null){
 			return null;
 		}
 		else
 		{
-			if (getNestedSize() > index)
-			{
-				Object obj = _nestedData.get(index);
-				return (DataElement) obj;
-			}
-			else
-			{
-				return null;
+			synchronized(_nestedData){ // bug 380158, sync needed to properly do concurrent commands
+				if (_nestedData.size() > index){
+					Object obj = _nestedData.get(index);
+					return (DataElement) obj;
+				}
+				else {
+					return null;
+				}
 			}
 		}
 	}