I too just had a "nasty" with ovtopmd not starting and did as James suggested 
by clearing out the databases and starting all over...which indeed worked and 
cleared up the problem.  (Apparently the cause was that I fired off Optivity's 
autotopology discovery process and somehow NetView didn't agree with the 
results.)

In any case, the clearing of the databases and rediscovering indeed clears up 
ovtompd problems.

Regards,
ken