错误信息：Dataset “” is not exists

visiond 2005-02-18 08:55:41

我的报表在FastReport2.5中一切正常，但我升级至FastReport3.09后出现错误：Dataset "" is not exists.
我的报表用于WEB打印，数据来源是从一个客户端数据集获得，我首先动态建立一个ClientDataset,然后得利ClientDataset.LoadFromFile('data.xml')从一个XML文件中加载数据，再将ClientDataset联结到TfrxDBDataset，而报表已经设置好数据集采用TfrxDBDataset。如果我的数据不是动态加载，就正常，即使在3.09版中也正常，但动态加载时在2.5中正常，升级至3.09则出现Dataset "" is not exists.不知为什么，后面有我的测试代码，我也将测试程序放在网站上供有兴趣的朋友帮助分析，谢谢！！

My report is ok in FR2.5, but when i migration fastreport from 2.5 to 3.09,i get the follow error: Dataset "" is not exists.

In my application, all data is created dynamic, for example, i always create a clientdateset, then load data from a xml file, then link the clientdataset to TfrxDBDataset, everything is ok in FR2.5, but when i migration fastreport from 2.5 to 3.09,i get the follow error: Dataset "" is not exists.

why??

The following code is test code, i can send the test project to anybody if you wish to get or download from the url: http://www.hsnet.cn/download/Fr309Test.exe
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procedure TForm1.Button1Click(Sender: TObject);
var
mast: TClientDataSet;
frmast: TfrxDBDataset;
report: TfrxReport;
begin
mast := TClientDataSet.Create(self);
mast.LoadFromFile('data.xml');
mast.Active := true;
frmast := TfrxDBDataSet.Create(self);
frmast.DataSet := mast;
report := TfrxReport.Create(self);
report.LoadFromFile('test.fr3');
report.ShowReport;
end;

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