Failed to save user fields in sales editor

Question

When the article is identified it makes all the changes below that it has to do. When I save the Sales Document it does not correctly save the changes to the document, when I load the document later saved some fields remain empty or incomplete.

• Cdu_lote and Cdu_variety below are as nvarchar and are also present in Linhasdoc.
• Cdu_boxes is recorded correctly (int)
• Cdu_lote only saves 10 characters (nvarchar 20)
• Cdu_variety does not write at all and stays inside the database as null (nvarchar 50)
• The Description is correctly recorded

When the article is identified:

When the saved document is loaded:

Code

public override void ArtigoIdentificado(string Artigo, int NumLinha, ref bool Cancel, ExtensibilityEventArgs e)
{
    base.ArtigoIdentificado(Artigo, NumLinha, ref Cancel, e); 
    DocumentoVenda.Linhas.GetEdita(NumLinha).CamposUtil["CDU_Caixas"].Valor = 30;
    DocumentoVenda.Linhas.GetEdita(NumLinha).CamposUtil["CDU_Lote"].Valor = "0123456789A";
    DocumentoVenda.Linhas.GetEdita(NumLinha).CamposUtil["CDU_Variedade"].Valor = "Nova-Vila L";
    DocumentoVenda.Linhas.GetEdita(NumLinha).Descricao = "Descr";
}