Interop.Domino library works unstablely

Hi,

I'm using Lotus Note version 8.5.2 and Interop.Domino library version 1.2.0.0 with C#.net 4.6. I have 2 tools to test sending email using Bcc but one works (send successfully with emails in bcc), one doesn't (throw an error with message "No recipient list for Send operation").

Here's my code:

NotesDocument nDoc = noteDatabase.CreateDocument();

nDoc.ReplaceItemValue(“Form”, “Memo”);

nDoc.ReplaceItemValue(“BlindCopyTo”, /string array of all bcc emails/);

nDoc.SaveMessageOnSend = true;

nDoc.Send(false);

nDoc = null;

These 2 tools are in Winform app, the same .net version (4.6), the same Interop.Domino (1.2.0.0), the same Lotus client (8.5.2), the same build configuration (Debug x86), the same way to send email (using button click event)

I can't find any difference between those 2 tools about settings/configurations of Interop.Domino. Anyone has any idea/experience about this issue?

Thank you very much.