Error:Adding Unchase OData Connected Service to the project failed: Cannot write to a closed TextWriter.

[softshipper]

I am trying to use https://github.com/unchase/Unchase.OData.Connectedservice/ to generate OData client C# code based on a metadata file.
The service is hosted on SAP/S4Hana and the metadata is in version 2.0.
Here is the content of the metadata:

<?xml version="1.0" encoding="utf-8"?>
<edmx:Edmx Version="1.0"
    xmlns:edmx="http://schemas.microsoft.com/ado/2007/06/edmx"
    xmlns:m="http://schemas.microsoft.com/ado/2007/08/dataservices/metadata"
    xmlns:sap="http://www.sap.com/Protocols/SAPData">
    <edmx:Reference Uri="https://sap/opu/odata/iwfnd/catalogservice;v=2/Vocabularies(TechnicalName='%2FIWBEP%2FVOC_AGGREGATION',Version='0001',SAP__Origin='EM_CORE')/$value"
        xmlns:edmx="http://docs.oasis-open.org/odata/ns/edmx">
        <edmx:Include Namespace="Org.OData.Aggregation.V1" Alias="Aggregation"/>
    </edmx:Reference>
    <edmx:Reference Uri="https://sap/opu/odata/iwfnd/catalogservice;v=2/Vocabularies(TechnicalName='%2FIWBEP%2FVOC_ANALYTICS',Version='0001',SAP__Origin='EM_CORE')/$value"
        xmlns:edmx="http://docs.oasis-open.org/odata/ns/edmx">
        <edmx:Include Namespace="com.sap.vocabularies.Analytics.v1" Alias="Analytics"/>
    </edmx:Reference>
    <edmx:Reference Uri="https://sap/opu/odata/iwfnd/catalogservice;v=2/Vocabularies(TechnicalName='%2FIWBEP%2FVOC_CAPABILITIES',Version='0001',SAP__Origin='EM_CORE')/$value"
        xmlns:edmx="http://docs.oasis-open.org/odata/ns/edmx">
        <edmx:Include Namespace="Org.OData.Capabilities.V1" Alias="Capabilities"/>
    </edmx:Reference>
    <edmx:Reference Uri="https://sap/opu/odata/iwfnd/catalogservice;v=2/Vocabularies(TechnicalName='%2FIWBEP%2FVOC_CODELIST',Version='0001',SAP__Origin='EM_CORE')/$value"
        xmlns:edmx="http://docs.oasis-open.org/odata/ns/edmx">
        <edmx:Include Namespace="com.sap.vocabularies.CodeList.v1" Alias="SAP__CodeList"/>
        <edmx:Include Namespace="com.sap.vocabularies.CodeList.v1" Alias="CodeList"/>
    </edmx:Reference>
    <edmx:Reference Uri="https://sap/opu/odata/iwfnd/catalogservice;v=2/Vocabularies(TechnicalName='%2FIWBEP%2FVOC_COMMON',Version='0001',SAP__Origin='EM_CORE')/$value"
        xmlns:edmx="http://docs.oasis-open.org/odata/ns/edmx">
        <edmx:Include Namespace="com.sap.vocabularies.Common.v1" Alias="Common"/>
    </edmx:Reference>
    <edmx:Reference Uri="https://sap/opu/odata/iwfnd/catalogservice;v=2/Vocabularies(TechnicalName='%2FIWBEP%2FVOC_COMMUNICATION',Version='0001',SAP__Origin='EM_CORE')/$value"
        xmlns:edmx="http://docs.oasis-open.org/odata/ns/edmx">
        <edmx:Include Namespace="com.sap.vocabularies.Communication.v1" Alias="Communication"/>
    </edmx:Reference>
    <edmx:Reference Uri="https://sap/opu/odata/iwfnd/catalogservice;v=2/Vocabularies(TechnicalName='%2FIWBEP%2FVOC_MEASURES',Version='0001',SAP__Origin='EM_CORE')/$value"
        xmlns:edmx="http://docs.oasis-open.org/odata/ns/edmx">
        <edmx:Include Namespace="Org.OData.Measures.V1" Alias="Measures"/>
    </edmx:Reference>
    <edmx:Reference Uri="https://sap/opu/odata/iwfnd/catalogservice;v=2/Vocabularies(TechnicalName='%2FIWBEP%2FVOC_PERSONALDATA',Version='0001',SAP__Origin='EM_CORE')/$value"
        xmlns:edmx="http://docs.oasis-open.org/odata/ns/edmx">
        <edmx:Include Namespace="com.sap.vocabularies.PersonalData.v1" Alias="PersonalData"/>
    </edmx:Reference>
    <edmx:Reference Uri="https://sap/opu/odata/iwfnd/catalogservice;v=2/Vocabularies(TechnicalName='%2FIWBEP%2FVOC_UI',Version='0001',SAP__Origin='EM_CORE')/$value"
        xmlns:edmx="http://docs.oasis-open.org/odata/ns/edmx">
        <edmx:Include Namespace="com.sap.vocabularies.UI.v1" Alias="UI"/>
    </edmx:Reference>
    <edmx:Reference Uri="https://sap/opu/odata/iwfnd/catalogservice;v=2/Vocabularies(TechnicalName='%2FIWBEP%2FVOC_VALIDATION',Version='0001',SAP__Origin='EM_CORE')/$value"
        xmlns:edmx="http://docs.oasis-open.org/odata/ns/edmx">
        <edmx:Include Namespace="Org.OData.Validation.V1" Alias="Validation"/>
    </edmx:Reference>
    <edmx:DataServices m:DataServiceVersion="2.0">
        <Schema Namespace="API_COMPANYCODE_SRV" xml:lang="en" sap:schema-version="1"
            xmlns="http://schemas.microsoft.com/ado/2008/09/edm">
            <Annotation Term="Core.SchemaVersion" String="1.0.0"
                xmlns="http://docs.oasis-open.org/odata/ns/edm"/>
            <EntityType Name="A_CompanyCodeType" sap:label="Company Code" sap:content-version="1">
                <Key>
                    <PropertyRef Name="CompanyCode"/>
                </Key>
                <Property Name="CompanyCode" Type="Edm.String" Nullable="false" MaxLength="4" sap:display-format="UpperCase" sap:label="Company Code"/>
                <Property Name="CompanyCodeName" Type="Edm.String" MaxLength="25" sap:label="Company Name" sap:quickinfo="Name of Company Code or Company"/>
                <Property Name="CityName" Type="Edm.String" MaxLength="25" sap:label="City"/>
                <Property Name="Country" Type="Edm.String" MaxLength="3" sap:display-format="UpperCase" sap:label="Country/Region Key"/>
                <Property Name="Currency" Type="Edm.String" MaxLength="5" sap:label="Currency" sap:quickinfo="Currency Key" sap:semantics="currency-code"/>
                <Property Name="Language" Type="Edm.String" MaxLength="2" sap:label="Language Key"/>
                <Property Name="ChartOfAccounts" Type="Edm.String" MaxLength="4" sap:display-format="UpperCase" sap:label="Chart of Accounts"/>
                <Property Name="FiscalYearVariant" Type="Edm.String" MaxLength="2" sap:display-format="UpperCase" sap:label="Fiscal Year Variant"/>
                <Property Name="Company" Type="Edm.String" MaxLength="6" sap:display-format="UpperCase" sap:label="Company"/>
                <Property Name="CreditControlArea" Type="Edm.String" MaxLength="4" sap:display-format="UpperCase" sap:label="Credit control area"/>
                <Property Name="CountryChartOfAccounts" Type="Edm.String" MaxLength="4" sap:display-format="UpperCase" sap:label="Alternative COA" sap:quickinfo="Alternative Chart of Accounts"/>
                <Property Name="FinancialManagementArea" Type="Edm.String" MaxLength="4" sap:display-format="UpperCase" sap:label="FM Area" sap:quickinfo="Financial Management Area"/>
                <Property Name="AddressID" Type="Edm.String" MaxLength="10" sap:display-format="UpperCase" sap:label="Address"/>
                <Property Name="TaxableEntity" Type="Edm.String" MaxLength="4" sap:display-format="UpperCase" sap:label="Taxes on Sls/Purc." sap:quickinfo="Taxes on Sales/Purchases Group"/>
                <Property Name="VATRegistration" Type="Edm.String" MaxLength="20" sap:display-format="UpperCase" sap:label="VAT Registration No." sap:quickinfo="VAT Registration Number"/>
                <Property Name="ExtendedWhldgTaxIsActive" Type="Edm.Boolean" sap:display-format="UpperCase" sap:label="Extended WTax Active" sap:quickinfo="Indicator: Extended Withholding Tax Active"/>
                <Property Name="ControllingArea" Type="Edm.String" MaxLength="4" sap:display-format="UpperCase" sap:label="Controlling Area"/>
                <Property Name="FieldStatusVariant" Type="Edm.String" MaxLength="4" sap:display-format="UpperCase" sap:label="Field status variant" sap:quickinfo="Field Status Variant"/>
                <Property Name="NonTaxableTransactionTaxCode" Type="Edm.String" MaxLength="2" sap:display-format="UpperCase" sap:label="Output Tax Code" sap:quickinfo="Output Tax Code for Non-Taxable Transactions"/>
                <Property Name="DocDateIsUsedForTaxDetn" Type="Edm.Boolean" sap:display-format="UpperCase" sap:label="Tax Determ.with Doc.Date" sap:quickinfo="Indicator: Document Date As the Basis for Tax Determination"/>
                <Property Name="TaxRptgDateIsActive" Type="Edm.Boolean" sap:display-format="UpperCase" sap:label="Tax Date" sap:quickinfo="Tax Reporting Date Active in Documents"/>
            </EntityType>
            <EntityContainer Name="API_COMPANYCODE_SRV_Entities" m:IsDefaultEntityContainer="true" sap:message-scope-supported="true" sap:supported-formats="atom json xlsx">
                <EntitySet Name="A_CompanyCode" EntityType="API_COMPANYCODE_SRV.A_CompanyCodeType" sap:creatable="false" sap:updatable="false" sap:deletable="false" sap:content-version="1"/>
            </EntityContainer>
            <Annotations Target="API_COMPANYCODE_SRV.API_COMPANYCODE_SRV_Entities"
                xmlns="http://docs.oasis-open.org/odata/ns/edm">
                <Annotation Term="Common.ApplyMultiUnitBehaviorForSortingAndFiltering" Bool="true"/>
            </Annotations>
            <Annotations Target="API_COMPANYCODE_SRV.API_COMPANYCODE_SRV_Entities"
                xmlns="http://docs.oasis-open.org/odata/ns/edm">
                <Annotation Term="Capabilities.BatchSupported" Bool="false"/>
            </Annotations>
            <Annotations Target="API_COMPANYCODE_SRV.API_COMPANYCODE_SRV_Entities/A_CompanyCode"
                xmlns="http://docs.oasis-open.org/odata/ns/edm">
                <Annotation Term="Capabilities.ReadRestrictions">
                    <Record>
                        <PropertyValue Property="Description" String="Reads the items of all company codes."/>
                        <PropertyValue Property="LongDescription" String="Reads the company codes available in your system."/>
                        <PropertyValue Property="ReadByKeyRestrictions">
                            <Record>
                                <PropertyValue Property="Description" String="Reads a company code by key."/>
                                <PropertyValue Property="LongDescription" String="Reads a selected company code for the provided company code key."/>
                            </Record>
                        </PropertyValue>
                    </Record>
                </Annotation>
            </Annotations>
            <atom:link rel="self" href="https://sap-s4odata/sap/opu/odata/sap/API_COMPANYCODE_SRV/$metadata"
                xmlns:atom="http://www.w3.org/2005/Atom"/>
            <atom:link rel="latest-version" href="https://sap-s4odata/sap/opu/odata/sap/API_COMPANYCODE_SRV/$metadata"
                xmlns:atom="http://www.w3.org/2005/Atom"/>
        </Schema>
    </edmx:DataServices>
</edmx:Edmx>

The following steps show how I imported the metadata file:

As you can see on the last step I have received an error.

I also tried to import https://services.odata.org/V2/Northwind/Northwind.svc/$metadata file and it generated OData client without any error.

Best regards

[brunohdossantos]

I also have the same error

[realJustmike]

Same here. Removing the following line from metadata.xml "fixed" it for now:
<Annotation Term="Core.SchemaVersion" String="1.0.0" xmlns="http://docs.oasis-open.org/odata/ns/edm"/>

[FranRDev]

Same error.

[destangfb01]

we use odata service in sap with c# connection and old service not include ("") this line. We success add old odata service in the project but not add new odata service in the project. only change new service <Ann... we asume for this.

then we add old service and change "EndPoint" : 'old to new' and we success use new odata service.