>I try this too but i obtain the same message

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Francis,
Would you try this :

- Remove HFlex part from init
- Add a command button

*Commandbutton.click
* Prepare HFlex Grid
with ThisForm.HFlex
  .Datasource = ThisForm.ADOData.Recordset
  for ix = 1 to .Cols - 1
    .MergeCol(ix) = .t.  && Merge cols
  endfor
  .MergeCells = 3
endwith	

Run form. After command window pops up again, click. If errors, check in debugger if "ThisForm.ADOData.Recordset" is .NULL.
Cetin