Server: Dell PE2650, 4GB RAM, 2x 2400MHz CPU, NW65SP3 (5.70.03)

When running SP3, problems were that the server slowly ran out of logical
space during a period of about ten days. Loaded SP4a hoping to resolve
this issue. Even during startup after loading SP4a, svr complained of
logical space issues. Applied recommended -u parameter in autoexec, but
svr still gives logical space warnings very shortly after startup. Had to
revert back to SP3. Please help with ideas or suggestions re. this issue
and SP4a. (Andries)