CUA IDoc Status 51 for some Users with RML

Hi,

I'm using a CUA and the following problem appears in some child systems only for some users with deposited Remote Mail:

IDoc Status 51

Text: Internal Error: FB ADDR_PERS_COMP_MAINTAIN_COMPL, exception 6

While debugging i found the position where it crashes, but I don't really understand what it means:

SAPLSZA13 / LSZA13F03 / 98

When changing R/Mail / SAPOffice in SCUL from Global to local the Error doesn't appears.

I tried to edit a test user and added a RML Address but the error only appears with some users and I can't identify the differences between the test user and the error users.

In other child systems the error doesn't occurs.

Maybe anybody can help me please?