duplicate id's in a4j:support

[maor mosh]

Hi all,

I have encountered a duplicate id error in a page I'm building. I have minimized the page to the following code:
I have two drop-down menus (t:selectOneMenu), a selection in the first automatically selects a value in the second.
Problem is, I get a duplicate id on "support1", which is obviously unique.
Any idea what could be the problem here?

 
<%@ page contentType="text/html;charset=windows-1255"
	pageEncoding="windows-1255"%>
<%@ taglib uri="https://ajax4jsf.dev.java.net/ajax" prefix="a4j"%>
<%@ taglib uri="http://myfaces.apache.org/tomahawk" prefix="t"%>
<%@ taglib uri="http://jsftutorials.net/htmLib" prefix="htm"%>
<%@ taglib uri="/WEB-INF/struts-tiles.tld" prefix="tiles"%>
<%@ taglib uri="http://java.sun.com/jsf/html" prefix="h"%>
<%@ taglib uri="http://java.sun.com/jsf/core" prefix="f"%>
<%@ taglib uri="http://www.coralnet.co.il/tags" prefix="coral"%>

<f:loadBundle
	basename="com.coral.asset.bundles.maintenanceInstructionDetails"
	var="mid" />
<f:loadBundle basename="com.coral.asset.bundles.ApplicationMessages"
	var="lbl" />

<t:inputHidden value="#{MaintenanceInstructionDetailsControl.loadData}" />
<t:saveState value="#{MaintenanceInstructionDetailsControl.instructionType}" />
<t:saveState value="#{MaintenanceInstructionDetailsControl.bean}" />
<t:saveState value="#{MaintenanceInstructionDetailsControl.contractorIdOld}" />
<t:saveState value="#{MaintenanceInstructionDetailsControl.uploadedFile}" />
<t:saveState value="#{MaintenanceInstructionDetailsControl.files}" />
<t:saveState value="#{MaintenanceInstructionDetailsControl.arrays}" />
<t:saveState value="#{MaintenanceInstructionDetailsControl.modeNew}" />
<t:saveState value="#{MaintenanceInstructionDetailsControl.success}" />
<t:saveState value="#{MaintenanceInstructionDetailsControl.dbTable}" />
<t:saveState value="#{MaintenanceInstructionDetailsControl.dbKeyId}" />
<t:saveState value="#{MaintenanceInstructionDetailsControl.dbKeyDesc}" />
<t:saveState value="#{MaintenanceInstructionDetailsControl.details.dateFormat}" />

<t:div id="mainDiv" styleClass="detailsDiv">

	<h:form id="mainFrm" dir="#{lbl.dir}" >
		<t:div id="detailsDiv">
			<htm:br />
			<htm:table id="bigTable" cellpadding="4" cellspacing="0" border="0"
				styleClass="detailsField" style="width:auto;">
				<htm:tbody>
					<htm:tr>
						<htm:td>
							<t:outputLabel value="#{mid.array}" />
						</htm:td>
						<htm:td>
							<div id="myDiv1"><a4j:region id="region1"
								renderRegionOnly="false">
								<t:selectOneMenu id="arrayId"
									value="#{MaintenanceInstructionDetailsControl.bean.arrayId}"
									valueChangeListener="#{MaintenanceInstructionDetailsControl.details.fieldChanged}">
									<f:selectItem itemLabel="#{lbl.choose}" itemValue="0" />
									<f:selectItems
										value="#{MaintenanceInstructionDetailsControl.arrays}" />
									<f:converter converterId="selectStringToInt" />
									<f:attribute name="DBType"
										value="#{JsfConstants.DB_TYPE_NUMBER}" />
									<a4j:support id="support1" event="onchange" 
										action="#{MaintenanceInstructionDetailsControl.onChangeArray}" />
								</t:selectOneMenu>
							</a4j:region></div>
							<a4j:outputPanel id="output1" ajaxRendered="true" layout="block">
								<t:message id="message1" for="arrayId" styleClass="dyna_error" />
							</a4j:outputPanel>
						</htm:td>
						<htm:td>
							<t:outputLabel value="#{mid.fileInstructionName}" />
						</htm:td>
						<htm:td>
							<div id="myDiv2"><a4j:region id="region2"
								renderRegionOnly="false">
								<t:selectOneMenu id="fileInstructionId"
									value="#{MaintenanceInstructionDetailsControl.bean.fileInstructionId}"
									valueChangeListener="#{MaintenanceInstructionDetailsControl.details.fieldChanged}">
									<f:selectItem itemLabel="#{lbl.choose}" itemValue="0" />
									<f:selectItems
										value="#{MaintenanceInstructionDetailsControl.files}" />
									<f:converter converterId="selectStringToInt" />
									<f:attribute name="DBType"
										value="#{JsfConstants.DB_TYPE_NUMBER}" />
								</t:selectOneMenu>
							</a4j:region></div>
							<a4j:outputPanel ajaxRendered="true" layout="block">
								<t:message id="message2" for="fileInstructionId"
									styleClass="dyna_error" />
							</a4j:outputPanel>
						</htm:td>
					</htm:tr>
				</htm:tbody>
			</htm:table>
		</t:div>
	</h:form>
</t:div>

[maor mosh]

Found out what caused this:
The valueChangedListener I was using attempted to change the "id" attribute within the event received, and this caused another attribute in the event ("clientId") to be set to null.

[maor mosh]

Found out what caused this:
The valueChangedListener I was using attempted to change the "id" attribute within the event received.
This caused another attribute in the event ("clientId") to be set to null.