绑定到类型数据集的Crystal Report在从相关表添加列时引发错误

I am using Crystal Reports 2008 to design reports and the Crystal Reports 2008 runtime to execute them in a web application. I have created a simple typed DataSet and that has two tables TestTable1 and TestTable2. Each has a few columns like Id, Text1, and Text2. I created a test report which uses this Typed DataSet as it's DataSource. If I add the columns from just one of the tables TestTable1 or TestTable2 the report is easily executed with this code.I am using Crystal Reports 2008 to design repor