Ok, I solved the problem, but not really. Temporarily removed the database of PL 3.3 and the already existing one of PL 4. Now PL 4 starts without any problem.
So the problem seems to be the database created by PL 4 that it converted from PL 3.3.
Ok, I solved the problem, but not really. Temporarily removed the database of PL 3.3 and the already existing one of PL 4. Now PL 4 starts without any problem.
So the problem seems to be the database created by PL 4 that it converted from PL 3.3.