Because of PETALSSERMI-22 (and previous old code actually), the cause of the exceptions thrown by the remote objects of the RMI SE were lost in the conversion.
The rational was to allow for proper serialisation of exceptions not present in the classpath of the RMI client, but it was more restricting than useful.
Since the RMI Client is only meant for tests, it is ok to assume that we can modify the tests when needed to include desired elements in the classpath when testing for some specific errors.
Fixed by r41271