Variable initialization question

[Jonathan Coogan]

Maybe someone can explain something to me.  I¹m having trouble getting an
inline variable initializer to work with Ode, and I¹m pretty sure I¹m doing
something wrong.  

Consider this variable declaration...

<bpws:variable messageType="ns0:GetAccountDetail"
name="abc_GetAccountDetail_Input">
    <bpws:from>
        <bpws:literal>
            <tns:GetAccountDetail xmlns:tns="urn:xmlns:Test"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance";
xsi:schemaLocation="urn:xmlns:Test Test.xsd ">
                <GetAccountDetailFilters>
                    <AcctNum/>
                </GetAccountDetailFilters>
            </tns:GetAccountDetail>
        </bpws:literal>
    </bpws:from>
</bpws:variable>

And this assign operation...

<bpws:assign name="Assign" validate="no">
    <bpws:copy>
        <bpws:from part="payload" variable="input"/>
        <bpws:to part="parameters" variable="abc_GetAccountDetail_Input">
            <bpws:query
queryLanguage="urn:oasis:names:tc:wsbpel:2.0:sublang:xpath1.0"><![CDATA[/Get
AccountDetailFilters/AcctNum]]></bpws:query>
        </bpws:to>
    </bpws:copy>
</bpws:assign>

When I try to invoke the process, Ode returns a fault and says this:

ERROR [ASSIGN]: Assignment Fault:
{http://docs.oasis-open.org/wsbpel/2.0/process/executable}selectionFailure,l
ineNo=42,faultExplanation=No results for expression: {OXPath10Expression
/GetAccountDetailFilters/AcctNum}

I must be doing something wrong.  It works fine if I put the initializer in
the Assign like this:

<bpws:variable messageType="ns0:GetAccountDetail"
name="abc_GetAccountDetail_Input"/>
...
<bpws:assign name="Assign" validate="no">
    <bpws:copy>
        <bpws:from>
            <bpws:literal>
                <tns:GetAccountDetail xmlns:tns="urn:xmlns:Test"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance";
xsi:schemaLocation="urn:xmlns:Test Test.xsd ">
                    <GetAccountDetailFilters>
                        <AcctNum/>
                    </GetAccountDetailFilters>
                </tns:GetAccountDetail>
            </bpws:literal>
        </bpws:from>
        <bpws:to part="parameters" variable="abc_GetAccountDetail_Input"/>
    </bpws:copy>
    <bpws:copy>
        <bpws:from part="payload" variable="input"/>
        <bpws:to part="parameters" variable="abc_GetAccountDetail_Input">
            <bpws:query
queryLanguage="urn:oasis:names:tc:wsbpel:2.0:sublang:xpath1.0"><![CDATA[/Get
AccountDetailFilters/AcctNum]]></bpws:query>
        </bpws:to>
    </bpws:copy>
</bpws:assign>

Any hints?  Thank you!
-Jon