How to save a file on an existing file in pdm? C#

[majo]

I'm stuck...
I want to copy a file from outside pdm to the vault on an existing file. The destination file is checked out!
Therefore I use the method "AddFile2":

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ExcelFileName = _saveName;
ExcelFilePath = _savePath;
DestinationFolder = (IEdmFolder8)Vault.GetFolderFromPath(_savePath);

DestinationFolder.AddFile2(0, ExcelTemplate, out int addFileStatus, _saveName, (int)EdmAddFlag.EdmAdd_Refresh);

Unfortunately im getting an error like this:

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"E_EDM_NAME_ALREADY_EXISTS: There is already a file with the specified name in this folder."

Any suggestions?

Cheers Mario

[JSculley]

AddFile is for adding new files to the vault. If you just want to copy over the top of an existing file, use the .NET System.IO.File.Copy function. As long as the file is checked out, it should work.