Acrobat API "ImportAnXFDF" in Acrobat Pro 2017

Thank you for your reply.
Below is the information you asked for.

Version number of Acrobat : Acrobat Pro 2017 (Classic) version 2017.011.30152

OS version : Windows 10 (64bit)
Microsoft Windows Server 2016 Datacenter 10.0.14393 Build 14393 (on VMWare7.1)

Our VB.NET code is following.

Imports Foo.Common
Imports Foo.Common.FooException

Namespace AcroExch

Public Class PDDoc : Inherits PDApp
Implements IDisposable

Private mPDDoc As Acrobat.CAcroPDDoc = Nothing
Private mJso As Object = Nothing

Private mSrcFName As String = ""


Public Sub OpenDoc(ByVal fname As String)

Dim bOK As Boolean
Dim e As FooException = Nothing

Try
    mSrcFName = fname

    ' PDFDoc
    mPDDoc = DirectCast(CreateObject("AcroExch.PDDoc"), Acrobat.CAcroPDDoc)
    If mPDDoc Is Nothing Then
        Throw New FooException(E_ACROEXCH_INIT)
    End If

    bOK = mPDDoc.Open(mSrcFName)
    If bOK <> True Then
        Throw New FooException(E_WOPENFILE)
    End If

    ' JSO
    mJso = mPDDoc.GetJSObject()
    If mJso Is Nothing Then
        Throw New FooException(E_ACROEXCH_INIT)
    End If

Catch ex As FooException
    e = ex
Catch ex As Exception
    e = New FooException(E_NOTREADY, ex.ToString())
Finally
    If Not (e Is Nothing) Then
        Throw e
    End If
End Try
End Sub

Public Sub CloseDoc()
Try
    If Not (mJso Is Nothing) Then
        mJso.closeDoc(True)
    End If
Catch ex As Exception

Finally
    ReleseComObject(mJso)
    mJso = Nothing
End Try

Try
    If Not (mPDDoc Is Nothing) Then
        mPDDoc.Close()
    End If
Catch ex As Exception

Finally
    ReleseComObject(DirectCast(mPDDoc, Object))
    mPDDoc = Nothing
End Try

End Sub

Public Sub ImportAnXFDF(ByVal filename As String)
Try
    Dim jsFName As String = PDApp.GetAcrobatPath(filename)
    mJso.ImportAnXFDF(jsFName)
Catch ex As Exception

End Try
End Sub

Public Sub Save()
    mPDDoc.Save(CShort(Acrobat.PDSaveFlags.PDSaveIncremental), mSrcFName)
End Sub

Public Sub Close()
    mPDDoc.Close()
End Sub

End Class

End Namespace

The exception error occured at "mJso.ImportAnXFDF(jsFName)".

The source of the XFDF file is local.

I can import the same XFDF file manually.

Best regards.