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I’m trying to generate a document with parameterized where i’m creating a template when it doesn’t already exist, generate the envelope, and update the fields.
The fields in the document are being set as {{FieldName}} as suggested by documentation, but the GetEnvelopeDocGenFormFields() for the envelope is returning no fields and any attempt to use the update throws an error.
i’ve added a simple version of my code bellow.
How is the sender field parameterization supposed work?
   public async Task TestCode()
   {
       var fileName = "test_document";
       string docBase64;
       using (FileStream fs = new FileStream($"E:\\{fileName}.docx", FileMode.Open, FileAccess.Read))
       {
           using (var ms = new MemoryStream())
           {
               fs.CopyTo(ms);
               var bytes = ms.ToArray();
               docBase64 = Convert.ToBase64String(bytes);
           }
       }
       // Add Template
       var template = await templatesApi.CreateTemplateAsync(accountId, new EnvelopeTemplate()
       {
           Name = "Test Template",
           Description = "Test Template Description",
           Shared = "false",
           Recipients = new() { Signers = new() { RoleName = "signer", RecipientId = "1" }] },
           Status = "created",
           Documents = <
               new Document()
               {
                   DocumentBase64 = docBase64,
                   Name = fileName,
                   FileExtension = "docx",
                   DocumentId = $"1",
                   DocGenFormFields =
                       new() { Name = "FieldOne", Label = "FieldOne", Value = "ABC" },
                       new() { Name = "FieldTwo", Label = "FieldTwo", Value = "123" },
                       new() { Name = "FieldThree", Label = "FieldThree", Value = "Xyz" }]
               }
           ]
       });
       // Create Envelople
       var envelope = await envelopesApi.CreateEnvelopeAsync(accountId, new EnvelopeDefinition()
       {
           TemplateId = template.TemplateId,
           Status = "created",
           TemplateRoles = rnew() { RoleName = "signer", Name = "Name", Email = "my.email@server.com", ClientUserId = "client1" }],
           EmailSubject = "Test Envelope"
       });
       // Get Fields - fieldResponse.DocGenFormFields is NULL
       var fieldResponse = await envelopesApi.GetEnvelopeDocGenFormFieldsAsync(accountId, envelope.EnvelopeId);
       // Set Fields - Throws Exception {"errorCode":"INVALID_REQUEST_PARAMETER","message":"The request contained at least one invalid parameter. Value for 'documentId' is invalid."}
       var fieldUpdateResponse = await envelopesApi.UpdateEnvelopeDocGenFormFieldsAsync(accountId, envelope.EnvelopeId, new DocGenFormFieldRequest()
       {
           DocGenFormFields =
               new DocGenFormFields()
               {
                   DocumentId = "1",
                   DocGenFormFieldList = N
                       new() { Name = "FieldOne", Value = "DEF" },
                       new() { Name = "FieldTwo", Value = "456" },
                       new() { Name = "FieldThree", Value = "Xyz" }
                   ]
               }]
       });
       var updateSummary = await envelopesApi.UpdateAsync(accountId, envelope.EnvelopeId, new Envelope() { Status = "sent" });
   }