执行存储过程，第一遍可以，第二遍出错
系统提示
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Debugger Exception Notification
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Project Re.exe raised exception class EAccessViolation with message 'Access violation at address 4DD419E8 in module 'msado15.dll'. Read of address 00000000'. Process stopped. Use Step or Run to continue.
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OK Help
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SP_Percent.ExecProc;//第二遍，在这个地方就出错

Delphi(Pascal) code

procedure TFrm_RP.Btn_AppPercentClick(Sender: TObject);var  Str_Path,Str_RPFile:string;  Str_DeptName:string;begin  inherited;      try            try                  with DM do                  begin                      SP_Percent.Close;                                     //通过存储过程来调用                      SP_Percent.ProcedureName :='P_AppointPercent';                      SP_Percent.Parameters.Clear;                      SP_Percent.Parameters.Refresh;                      SP_Percent.Parameters.ParamByName('@S_BeginTime').Value := DTP_Begin.Date;                      SP_Percent.Parameters.ParamByName('@S_EndTime').Value := DTP_End.Date;                      SP_Percent.Parameters.ParamByName('@DeptID').Value := '25';                      SP_Percent.Parameters.ParamByName('@AllDept').Value := 1;                      SP_Percent.Parameters.ParamByName('@CountApp').Value := -1;                      SP_Percent.Parameters.ParamByName('@CountAppYse').Value := -1;                      SP_Percent.Parameters.ParamByName('@CountAppNo').Value := -1;                      SP_Percent.ExecProc;//第二遍，在这个地方就出错                      Str_Path:=  ExtractFilePath( Application.ExeName );                      Str_RPFile := Str_Path + 'rp\AppPercent.rmf';                      RMDBDataSet_DM.DataSet := SP_Percent;                      RMReport_DM.LoadFromFile(Str_RPFile);                      RMReport_DM.PrepareReport();                      RMReport_DM.ShowReport;                  end;            except                  on E:Exception do                  begin                        Write_LogErr(FinalUnit+'0004:打印赴约图表',IntToStr(E.HelpContext)+':'+E.Message,'');                  end;            end;//end except      finally            DM.SP_Percent.Close;      end;//end finallyend;

[解决办法]
去掉
SP_Percent.Parameters.Clear;
SP_Percent.Parameters.Refresh;

有你的存程是做某些作是返回集，返回集的一般用Active:=True;，做似update，insert作就用ExecProc
[解决办法]
掉个简单点的存储过程，试试，代码貌似无问题