Your BI Server is connecting to a different database than the one that you think, and/or it is connecting as a user that does not have permission to access that table.
Check your Connection Pool user, check your Connection Pool DSN, and if you're using TNSNAMES, check the TNSNAMES.ORA that the BI Server is using to make sure it's pointing to the database you expect.
Try by putting the TNS entries of your database in the TNSNAMES.ORA in the rpd and then check .
Check if you have the table in the database which your connection pool is pointing to.
Check your tnsnames file for the DSN entry.
Hope this helps
Your information helped me.
My table is not in database which my conncetion pool is pointing to.
I am glad that I could of some help to you. Care to award points