Retrieve user and date information from a register when ORA-01403 error appears.

It's usual retrieve information about what user and which date a resgister has been modified. We can know this information using (Help|Register History)option. But in some forms don't give us this information and instead of this next picture appear:

 For this reason we can use (Help|Diagnostic|Examine...), [but previously we need to know oracle password]. In block Field we choose LAST_UPDATE BY.

User Number id is relationed with a final user and can recover navigating by
Responsability:System Administrator
(Security|User|Define), and
(Help|Diagnostic|Examine...), In block Field we choose USER_ID and look for LAST_UPDATED_BY value.