> SQL.Add('Select *From PRODUTOS_SALDOS');

^^
While SELECT* and *FROM may be technically valid syntax it is not
recommended as all sorts of confusion may result. Insert the
additional space and see if the problem resolves.

A similar problem was discuseed on IB_Support recently and there is a
suspected bug in IBO relating to this syntax.

hth

--
Geoff Worboys - TeamIBO
Telesis Computing