In this examples is neccessary a .Size property.
B4X:
Sub btnOkFrmCliArt_clicked(Target As String) ' btnOkFrmCliArt
Dim tbl As ABMTable = RetSheetEdicionFrmCliArt.Content.Component("tblFrmCliArt")
Dim nRow As Int
tblCases.PrepareTableForRetrieval
For nRow = 0 To 50 ' here tbl.size
Log("viendo table-" & tblCases.GetString(nRow, 1) )
Next
End Sub