Manoj
What version of RS do yo have ?
You can use following [e]RSSD stored procedure to find all refdefs for a primary table
rs_helpreptable source_database, [owner,] table_name
But in your case --- going by the error message ---- it seems not related to any repdef.
It looks like dump transaction coammnd has gone through replication pipeline.
At your site are you using coordinated dump feature of RS ?
If not just alter the connection not to use coordinated dump
alter connection ....."dump_load" to "off"
HTH
Avinash