I'm using C# with CR10, and am having a very strange problem. I'm able to isolate it, as follows...

1) I create a DataSet/XSD manually in VS.NET. Let's say it's 5 datatables, each with an ID and a description.

2) I create a report in CR10, and point to the XSD as the data source, and drop some of the columns on a report

3) I go back to VS.NET, and run the report, using the following...

myReport.Database.SetDataSource(MyDs.Tables[0],3,1);
myReport.Database.SetDataSource(MyDs.Tables[1],3,2);

...and so on...

Everything is fine...Until

4) I go back into the XSD designer, and manually add a couple of text/string columns...I regenerate the XSD, I re-open the report, delete the dataset definition and re-add it, and then go back to VS.NET and re-run my routine that generates the report

5) On the tables where I added columns, I get "Object reference not set to an instance of an object". If I remove the columns, the error goes away. The data for the new columns are not 'null', they are definitely populated.

Even if I create a brand new report with the modified XSD, I have the same problem.

Any ideas?

Thanks,
Kevin