The procedure "SP_name" has no parameter named "@typ_table"

 sqlcmd = new SqlCommand("SP_Name", conn);
 conn.Open();
 sqltrans = conn.BeginTransaction();
 sqlcmd.Transaction = sqltrans;
 sqlcmd.CommandType = CommandType.StoredProcedure;


 sqlcmd.Parameters.Add(new SqlParameter("@UserId", SqlDbType.Int, 4, ParameterDirection.Input, false, 0, 0, "", DataRowVersion.Proposed, UserId));



 sqlcmd.Parameters.Add(new SqlParameter("@Typ_Table", dt));

string Result = sqlcmd.ExecuteScalar().ToString();