Strange commit error with latestError empty

In an import of data of about 3500 people I have one person where the commit fails. So I turned on the debugger to see what is happening with this person. The problem is that the commit throws a fault but the fault is empty (see screenshot). I do a commit without events. It is not a duplicate name of the user. That would result in a normal error message. Anybody a guess where to look? Or just file a bug report because one should never get an error with an empty message? Regards, Ronald
1 answers

Is Java involved here? Seems like some general Java exception handling. If so, running from eclipse with a couple of breakpoints might shed some light here.