/**
         *	Prepare Document
         *  @return new status (In Progress or Invalid)
         */
        public String PrepareIt()
        {
            try
            {
                log.Info(ToString());
                _processMsg = ModelValidationEngine.Get().FireDocValidate(this, ModalValidatorVariables.DOCTIMING_BEFORE_PREPARE);
                if (_processMsg != null)
                {
                    return(DocActionVariables.STATUS_INVALID);
                }
                MRequisitionLine[] lines = GetLines();

                //	Invalid
                if (GetAD_User_ID() == 0 ||
                    GetM_PriceList_ID() == 0 ||
                    GetM_Warehouse_ID() == 0 ||
                    lines.Length == 0)
                {
                    return(DocActionVariables.STATUS_INVALID);
                }

                //	Std Period open?
                if (!MPeriod.IsOpen(GetCtx(), GetDateDoc(), MDocBaseType.DOCBASETYPE_PURCHASEREQUISITION))
                {
                    _processMsg = "@PeriodClosed@";
                    return(DocActionVariables.STATUS_INVALID);
                }

                // is Non Business Day?
                if (MNonBusinessDay.IsNonBusinessDay(GetCtx(), GetDateDoc()))
                {
                    _processMsg = Common.Common.NONBUSINESSDAY;
                    return(DocActionVariables.STATUS_INVALID);
                }



                //	Add up Amounts
                int     precision  = MPriceList.GetStandardPrecision(GetCtx(), GetM_PriceList_ID());
                Decimal totalLines = Env.ZERO;
                for (int i = 0; i < lines.Length; i++)
                {
                    MRequisitionLine line    = lines[i];
                    Decimal          lineNet = Decimal.Multiply(line.GetQty(), line.GetPriceActual());
                    lineNet = Decimal.Round(lineNet, precision);//, MidpointRounding.AwayFromZero);
                    if (lineNet.CompareTo(line.GetLineNetAmt()) != 0)
                    {
                        line.SetLineNetAmt(lineNet);
                        line.Save();
                    }
                    totalLines = Decimal.Add(totalLines, line.GetLineNetAmt());
                }
                if (totalLines.CompareTo(GetTotalLines()) != 0)
                {
                    SetTotalLines(totalLines);
                    Save();
                }
                _justPrepared = true;
            }
            catch (Exception ex)
            {
                // MessageBox.Show("MRequisition--PrepareIt");
                log.Severe(ex.ToString());
            }
            return(DocActionVariables.STATUS_INPROGRESS);
        }