Couple of possibilities here:
http://support.microsoft.com/kb/269204
http://support.microsoft.com/kb/294783
HTH,
Paul Ibison

Hello ,

I scripted the creation of my Replication ,
Then droped the Replication ,
Added 1 or 2 new Fields in 5 existing tables
and then Recreated the Replication using the scripted File.

The Replication is Created Succesfully but I got an Error when running
the
Snapshot Agent
The Error Is

Invalid column name 'rowguid'.

Can Anyone Help Please

Thanks
Savvas

I set the @keep_partition_changes = N'false' in the Create
Replication Script
then run snapshot and it worked