TransformPDFFields option not working in CreateEnvelopeFromTemplatesAndForms using SOAP API - vb.net

Question

I am trying to create envelop using CreateEnvelopeFromTemplatesAndForms to make the pdf form fields editable. I am gettting unspecified_error. I have also tried removing the document from composite template and adding the document in the inline template envelop. In this case it creates and sends the envelop but does not make the fields editable. See my code below
'compositeTemplate
Dim envInfo As New EnvelopeInformation
With envInfo
.AccountId = c.AccountID
.Subject = subject
.EmailBlurb = emailBlurb
End With
Dim template As New CompositeTemplate
'recipients
Dim recipients As New List(Of Recipient)
For iRecip As Integer = 1 To packet.Recipients.Count
Dim recipient As New Recipient
Dim customfields As New List(Of String)
With packet.Recipients(iRecip - 1)
recipient.Email = .Email
recipient.SignerName = .Name
recipient.UserName = .Name
recipient.ID = .ID
recipient.RoutingOrder = .RoutingOrder
recipient.RoutingOrderSpecified = True
recipient.RequireIDLookup = .RequireIDLookup
recipient.RequireIDLookupSpecified = True
recipient.AccessCode = .AccessCode
recipient.AddAccessCodeToEmail = False
recipient.AddAccessCodeToEmailSpecified = True
recipient.DefaultRecipient = .DefaultRecipient
recipient.DefaultRecipientSpecified = .IsDefaultRecipientSpecified
If (Not String.IsNullOrEmpty(.CaptiveInfoClientUserId)) Then
recipient.CaptiveInfo = New RecipientCaptiveInfo()
recipient.CaptiveInfo.ClientUserId = .CaptiveInfoClientUserId
End If
customfields.Add(String.Format("SignerRole={0}", .Role))
End With
'add customfields list to recipient customfields
recipient.CustomFields = customfields.ToArray
recipients.Add(recipient)
Next
Dim inlineTemplate As New InlineTemplate
inlineTemplate.Sequence = 1
inlineTemplate.Envelope = New Envelope
inlineTemplate.Envelope.AccountId = c.AccountID
With inlineTemplate.Envelope
.Notification = New APIService.Notification
Dim exp As New APIService.Expirations
With exp
.ExpireEnabled = _envelopeExpirationEnabled
If _envelopeExpirationEnabled Then
.ExpireAfter = _envelopeExpirationDays
If _envelopeExpirationWarningEnabled Then
.ExpireWarn = _envelopeExpirationWarningDaysLeft
End If
End If
End With
.Notification.Expirations = exp
End With
Dim tabs As New List(Of Tab)
'add documents
Dim documents As New List(Of Document)
Dim matchBoxes As New List(Of MatchBox)
For iDoc As Integer = 1 To packet.Forms.Count
Dim theForm As Objects.Form = packet.Forms(iDoc - 1)
theForm.ID = iDoc
Dim document As New Document
document.Name = theForm.FilePath
document.PDFBytes = theForm.FileBytes
document.ID = theForm.ID
document.TransformPdfFields = True
'add tabs - this will be based on metadata defined in the database for the attached forms
For Each oTab As Objects.Tab In theForm.Tabs
Dim tab As New Tab
If Not String.IsNullOrEmpty(oTab.AnchorText) AndAlso oTab.TabType <> TabTypeCode.Custom Then
Dim aTab As New AnchorTab
aTab.AnchorTabString = oTab.AnchorText
tab.AnchorTabItem = aTab
ElseIf oTab.TabType = TabTypeCode.Custom Then
tab.TabLabel = oTab.AnchorText
End If
With tab
.DocumentID = document.ID
.RecipientID = oTab.Recipient.ID
.Type = oTab.TabType
.PageNumber = oTab.PageNumber
.XPosition = oTab.XPosition
.YPosition = oTab.YPosition
If .Type = TabTypeCode.InitialHere Then
.ScaleValueSpecified = True
.ScaleValue = 0.53
End If
End With
tabs.Add(tab)
Next
documents.Add(document)
Next
inlineTemplate.Envelope.Recipients = recipients.ToArray
inlineTemplate.Envelope.Tabs = tabs.ToArray
template.InlineTemplates = New InlineTemplate() {inlineTemplate}
template.Document = New Document
template.Document.ID = 1
template.Document.Name = "TemplateDoc"
template.Document.PDFBytes = documents(0).PDFBytes
template.Document.TransformPdfFields = True
template.Document.FileExtension = "pdf"
Dim _apiProxy As APIServiceSoap = CreateApiProxy(c)
Dim envStatus As EnvelopeStatus = _apiProxy.CreateEnvelopeFromTemplatesAndForms(envInfo, New CompositeTemplate() {template}, True)
Any assistance would be greatly appreciated.
Thanks,
Pulak

Answer 1

The best way to debug such issues (which are sometimes bugs on the DocuSign server side) is to inspect your raw (XML based) SOAP request that you are sending over the wire. If I were you I would include it here in your question as it's much easier to diagnose when we can see the request as opposed to the code that creates the request.
With that said, are setting the tab's Locked property to false so that it's editable? You'll also need to set CustomTabLockedSpecified property to true for this to take affect.
Basically, in your tab definition code try something like this:
With tab
.DocumentID = document.ID
.RecipientID = oTab.Recipient.ID
.Type = oTab.TabType
...
.CustomTabLockedSpecified = True
.CustomTabLocked = False