I have a subscriber attached to a publication. I dropped the subscription, altered the publication and created a new subcription.

This now gives me the following messages.

The process could not deliver the snapshot to the Subscriber.
The process could not bulk copy into table '"dbo"."sysmergesubsetfilters"'.
Unable to open BCP host data-file.

The BCP file for sysmergesubsetfilters exists.
There are also a number of other subscribers which have been succesffuly reattached.

All suggestions gratefully received.