Error: Cannot generate report. Could not open DataSet: DBPipeline

rbuser

Hi,

I'm getting this error in a subreport linked to a pipeline that sometimes
has no records to show and just in these cases the error message appears.
The DBPipeline is connected to an DevExpress MemoryTable and when it has
data records everything goes fine.

Any ideas ?

Thanks in advance
Mocte

nardmoseley

When the report engine initializes, it will open each datapipeline used in
the report. It will then check to see whether the DataPipeline is Active.
Perhaps your dataset is raises an exception when DataSet.Open is called, or
perhaps when the DataSet is empty the DataSet.Active property is returning
False (an empty dataset should still return a Dataset.Active value of True).

Modify your Delphi library path from RBuilder\Lib to RBuilder\Source. Set
the debugger to break on Delphi exceptions. The debugger will open the
source code at the point where the exception occurs. You can then examine
the code and the call stack and see what's going on.

See ppDBPipe.pas, the method OpenDataSet and ppEngine.pas, the method
OpenDataPipeline.



--
Nard Moseley
Digital Metaphors Corporation
www.digital-metaphors.com

rbuser

Nard,

That was very usefull, now I've discovered that the error was caused by
dataset related code, and it has nothing to do with RB.

Thanks
Mocte