[fpc-pascal] TBufDataset error

[Antonio Fortuny]

Hi Guys.

Got something funny using the TBufDataSet FCL component.
One is dropped onto a TForm.
I fill in some TFields (double click on the component image) and give 
them a name, datatype, size.
When I try to open I get the funny message:    Missing (compatible) 
underlying dataset, cannot open

Lazarus 1.1 39279, FPC 2.6.1, i386-win32, on  Vista

Antonio.