Problem with expression shape

I am using an Oracle adapter to insert an edi status record into my Oracle database.  Everything works fine as long as I have only a single insert in the message.  When I add a second insert, I receive an error.  The error is due to an xpath command I have which copies the messageID into one of the columns.

My expression editor has the following two commands :

Output_Insert_Message = Insert_Message;

xpath(Output_Insert_Message,”//*[local-name()=’PARM_3′]”) = Insert_Message(BTS.MessageID);

If I comment out the xpath command, everything works fine, but then the PARM_3 column in my Oracle database does not have the messageid.

Here is the message that works:

<ns0:Insert xmlns:ns0=”http://Microsoft.LobServices.OracleDB/2007/03/HM_WO/Table/WO_EDI_UPDATE_COMMAND“>
<ns0:RECORDSET>
<ns0:WO_EDI_UPDATE_COMMANDRECORDINSERT>
<ns0:COMMAND_TYPE>RCVD_997</ns0:COMMAND_TYPE>
<ns0:PARM_1>a</ns0:PARM_1>
<ns0:PARM_3>x1</ns0:PARM_3>
</ns0:WO_EDI_UPDATE_COMMANDRECORDINSERT>
</ns0:RECORDSET></ns0:Insert>

Here is the message that doesn’t work:

<ns0:Insert xmlns:ns0=”http://Microsoft.LobServices.OracleDB/2007/03/HM_WO/Table/WO_EDI_UPDATE_COMMAND“>
<ns0:RECORDSET>
<ns0:WO_EDI_UPDATE_COMMANDRECORDINSERT>
<ns0:COMMAND_TYPE>RCVD_997</ns0:COMMAND_TYPE>
<ns0:PARM_1>a</ns0:PARM_1>
<ns0:PARM_3>x1</ns0:PARM_3>
</ns0:WO_EDI_UPDATE_COMMANDRECORDINSERT>
<ns0:WO_EDI_UPDATE_COMMANDRECORDINSERT>
<ns0:COMMAND_TYPE>RCVD_997</ns0:COMMAND_TYPE>
<ns0:PARM_1>b</ns0:PARM_1>
<ns0:PARM_3>x2</ns0:PARM_3>
</ns0:WO_EDI_UPDATE_COMMANDRECORDINSERT>
</ns0:RECORDSET></ns0:Insert>

I assume that the reason the second message fails is that the xpath command finds more than one PARM_3 node, which the assignment command can’t handle.  My question is how to use the expression shape to update all PARM_3 nodes.

Any help would be appreciated.

Thanks.