ora 01440 : can not inser null into migralog (id column)
From Source (SQL Server) the migro table is trying insert a null value,where a not null constraint is available in the target (Oracle DB). It is expecting a value for this row and the respective column cannot be null.
Do a describe on the respective table to find out the affecting column, and disable the constraint .. Otherwise insert a dummy record on the source table.
SQL Developer 4.0 is an Early Adopter version. Can you please retry with version 3.2.2 which is still available at:
It would be good to know if that exhibits the same problem or not. Please don't forget to truncate your migration repository before trying 3.2.2.
Note: it is not good to have two threads with the same title and nearly the same content. You should have added your assumption about long table names to this thread. That only muddies the water. I suggest that you close the other thread as answered.