Expression must evaluate to a node-set - XML SOAP

This is a discussion on Expression must evaluate to a node-set - XML SOAP ; I am using xpath within a BizTalk 2006 orchestration. I get the following error "Expression must evaluate to a node-set". My xml: <EmailListResponse xmlns="http://BTTest"> <PersonContact EMailContactValue="test1@mail.com" /> <PersonContact EMailContactValue="test2@mail.com" /> </EmailListResponse> My xpath expression which generates the error message: varNoOfEmailAddresses ...

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Expression must evaluate to a node-set

  1. Default Expression must evaluate to a node-set

    I am using xpath within a BizTalk 2006 orchestration.
    I get the following error "Expression must evaluate to a node-set".

    My xml:

    <EmailListResponse xmlns="http://BTTest">
    <PersonContact EMailContactValue="test1@mail.com" />
    <PersonContact EMailContactValue="test2@mail.com" />
    </EmailListResponse>


    My xpath expression which generates the error message:

    varNoOfEmailAddresses = (System.Int32)xpath(msgEmailListRes, "count(/
    *[local-name()='EmailListResponse']/*[local-name()='PersonContact']/
    *[[local-name()='EMailContactValue']
    [not(text()=preceding::EMailContactValue/text())])");

    varNoOfEmailAddresses is a local orchestration variable
    msgEmailListRes is a local orchestration message


    Kan anyone tell me what I am doing wrong?


    I have the following xml and xpath expression, which does not fail
    (very similar):

    <SHT_Req xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns="http://
    BTTest.Schemas.SHT_Req">
    - <Header xmlns="">
    <SHTRefId>20070130_12</SHTRefId>
    <SentAt>2007-01-30T00:00:00</SentAt>
    </Header>
    - <Body xmlns="">
    - <VesselIdentification>
    <IMONumber>3424</IMONumber>
    <MMSINumber>23424</MMSINumber>
    <CallSign>234</CallSign>
    <ShipName>20070130_12</ShipName>
    </VesselIdentification>
    - <AISInformation>
    <Longitude>3234</Longitude>
    <Latitude>234234</Latitude>
    <Timestamp>2007-01-30T00:00:00</Timestamp>
    <Destination>234</Destination>
    </AISInformation>
    - <NotifyCountries>
    <CountryCode>NOR</CountryCode>
    </NotifyCountries>
    </Body>
    </SHT_Req>

    varNoOfCountries = (System.Int32)xpath(msgSHT_Req, "count(/*[local-
    name()='SHT_Req']/*[local-name()='Body']/*[local-
    name()='NotifyCountries']/*[local-name()='CountryCode']
    [not(text()=preceding::CountryCode/text())])");

    varNoOfCountries is a local orchestration variable
    msgSHT_Req is a local orchestration message

  2. Default Re: Expression must evaluate to a node-set

    anetasalomonsen@hotmail.com wrote:
    > I am using xpath within a BizTalk 2006 orchestration.
    > I get the following error "Expression must evaluate to a node-set".
    >
    > My xml:
    >
    > <EmailListResponse xmlns="http://BTTest">
    > <PersonContact EMailContactValue="test1@mail.com" />
    > <PersonContact EMailContactValue="test2@mail.com" />
    > </EmailListResponse>
    >
    >
    > My xpath expression which generates the error message:
    >
    > varNoOfEmailAddresses = (System.Int32)xpath(msgEmailListRes, "count(/
    > *[local-name()='EmailListResponse']/*[local-name()='PersonContact']/
    > *[[local-name()='EMailContactValue']
    > [not(text()=preceding::EMailContactValue/text())])");

    You are at least not properly dealing with the EMailContactValue
    attributes in the XML as your XPath only looks at elements. I am not
    sure what you want to achieve, does this XPath help?

    count(/*[local-name()='EmailListResponse']/*[local-name()='PersonContact']
    [not(@EMailContactValue=preceding::*/@EMailContactValue)])

    It counts the elements with local name being 'PersonContact' for which
    the attribute condition
    not(@EMailContactValue=preceding::*/@EMailContactValue) holds.
    --

    Martin Honnen --- MVP XML
    http://JavaScript.FAQTs.com/

  3. Default RE: Expression must evaluate to a node-set


    > I am using xpath within a BizTalk 2006 orchestration.
    > I get the following error "Expression must evaluate to a node-set".
    >
    > My xml:
    >
    > <EmailListResponse xmlns="http://BTTest">
    > <PersonContact EMailContactValue="test1@mail.com" />
    > <PersonContact EMailContactValue="test2@mail.com" />
    > </EmailListResponse>
    >
    >
    > My xpath expression which generates the error message:
    >
    > varNoOfEmailAddresses = (System.Int32)xpath(msgEmailListRes, "count(/
    > *[local-name()='EmailListResponse']/*[local-name()='PersonContact']/
    > *[[local-name()='EMailContactValue']
    > [not(text()=preceding::EMailContactValue/text())])");
    >
    > varNoOfEmailAddresses is a local orchestration variable
    > msgEmailListRes is a local orchestration message
    >
    >
    > Kan anyone tell me what I am doing wrong?
    >
    >
    > I have the following xml and xpath expression, which does not fail
    > (very similar):
    >
    > <SHT_Req xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    > xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns="http://
    > BTTest.Schemas.SHT_Req">
    > - <Header xmlns="">
    > <SHTRefId>20070130_12</SHTRefId>
    > <SentAt>2007-01-30T00:00:00</SentAt>
    > </Header>
    > - <Body xmlns="">
    > - <VesselIdentification>
    > <IMONumber>3424</IMONumber>
    > <MMSINumber>23424</MMSINumber>
    > <CallSign>234</CallSign>
    > <ShipName>20070130_12</ShipName>
    > </VesselIdentification>
    > - <AISInformation>
    > <Longitude>3234</Longitude>
    > <Latitude>234234</Latitude>
    > <Timestamp>2007-01-30T00:00:00</Timestamp>
    > <Destination>234</Destination>
    > </AISInformation>
    > - <NotifyCountries>
    > <CountryCode>NOR</CountryCode>
    > </NotifyCountries>
    > </Body>
    > </SHT_Req>
    >
    > varNoOfCountries = (System.Int32)xpath(msgSHT_Req, "count(/*[local-
    > name()='SHT_Req']/*[local-name()='Body']/*[local-
    > name()='NotifyCountries']/*[local-name()='CountryCode']
    > [not(text()=preceding::CountryCode/text())])");
    >
    > varNoOfCountries is a local orchestration variable
    > msgSHT_Req is a local orchestration message

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    BizTalk Utilities - Frustration free BizTalk Adapters
    http://www.topxml.com/biztalkutilities
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