If any errors are reported, the conditions that required the report must be changed in such a way as to rectify the problem, and the merging process must (at least theoretically, for purposes of this RM4TM's definition of the merging process in terms of its required results) be restarted at the step described in parid0476 6.2.

move to separate error reporting section, or simply delete. If
reportable topic map processing errors for merger are all fatal, merger
simply fails, what more need we say than that. If an application wants
to start up from where merger failed, it can do so but generally not our
problem.