Database Connector Error from CMC

Question

I get database connector error when I schedule a report from CMC for Previous months begin and end date.For other critieria the report works fine. It works when I give previous dates to Trnasaction Post date > 10/01/2010 and  Trnasaction Post date < 10/31/2010.But When I write the sql to get these dates and replace the dates with this logic for begin and end date.After 10-15 minutes or after 30 minutes I get Database connecotr error in CMC. This logic works fine for other reports created by other developers and when I apply the same for their reports they run fine.In this case  This report is eactly save as  of another report.That report works fine for this kind of a criteria.But this report does not.
We are using Oracle 11.1.0  on client
Error Message: Error in File ~tmp7113661730ff810.rpt: Database Connector Error 
CMC Product: 12.1.0 © 2008 Business Objects
CR designer 2008 12.2.3.467
In tnsnames.ora
Here is the following info
pnet02d_dw =
  (DESCRIPTION =
    (ADDRESS_LIST =
      (FAILOVER = on)
      (SDU = 32767)
      (LOAD_BALANCE = on)
      (ADDRESS = (PROTOCOL = TCP)(HOST = tss2a017v1)(PORT = 4329))
      (ADDRESS = (PROTOCOL = TCP)(HOST = tss2a017v1)(PORT = 4329))
      (LOAD_BALANCE = yes)
    (CONNECT_DATA =
      (SERVICE_NAME = pnet02d_dw)
      (FAILOVER_MODE =
        (TYPE = select)
        (METHOD = basic)
      (DELAY = 1)
      (RETRIES = 5)

Answer 1

The problem is solved by some extentent.By performance tuning the query  the package does finish executing in few minutes.The actuall error in Designer was out of temp DB.