An occures in Microsoft.Crm.CrmException: Invalid property 'Email_activity_parties' was found in entity 'Microsoft.Dynamics.CRM.email'. ---> Microsoft.OData.ODataException: Does not support untyped value in non-open type

[mohammadDarAhmad]

Hi,
I am trying to create an email, but I can't because this error is shown to me
```
public bool SendEmail(Guid fromQueue, List recipients, string subj, string description)
{
try
{
ActivityParty fromParty = new ActivityParty
{
PartyId = new EntityReference(Queue.EntityLogicalName, fromQueue)
};

            Email email= new Email
            {
                To = recipients.Select(r => new ActivityParty { AddressUsed = r }),
                From = new ActivityParty[] { fromParty },
                Subject = subj,
                Description = description,
                DirectionCode = true
            };

            using (var service = crmConnection.GetService())
            {
                Guid emailId = Guid.Empty;

                try
                {
                    emailId = service.Create(email);
                }
                catch (Exception ex)
                {
                    return false;
                }

                if (emailId != Guid.Empty)
                {
                    var emailRequest = new SendEmailRequest
                    {
                        EmailId = emailId,
                        TrackingToken = "",
                        IssueSend = true
                    };

                    var emailResponse = (SendEmailResponse)service.Execute(emailRequest);

                    if (emailResponse != null && emailResponse.Results != null && emailResponse.Results.Count > 0)
                    {
                        return true;
                    }

                    else
                    {
                        return false;
                    }
                }
                else
                {
                    return false;
                }
            }
        }
        catch (Exception ex)
        {
            return false;
        }
    }
}

}

I try to add EntityCollection 

 Create a new EntityCollection to add the party
                 ```
   EntityCollection from = new EntityCollection();
                    // Create activity party linked to account (from)
                    Entity apEntity = new Entity("activityparty");
                    apEntity.Attributes["partyid"] = new EntityReference("systemuser", fromQueue);
                    from.Entities.Add(apEntity);

                    // Create email
                    Entity emailEntity = new Entity("email");
                    emailEntity.Attributes["subject"] = "Mail Subject GUID";
                    emailEntity.Attributes["from"] = from;`

But I still have the same issue
I am using Microsoft.PowerPlatform.Dataverse.Client 0.5.7 version

---

Edit
once I used the 0.4.19 version, it's working for me

[MattB-msft]

Issue is due to a change caused by the need to pick up schema name for some relationship definitions and not others, this was picked up in the sweep... but activity parties are "special" and have different rules.

Fix in flight

[MattB-msft]

Fix for this should be out on 10/21