OCI calls failing for Oracle 11g 11.1.0.7 (64 bit)

Question

Hi,
I have a 32bit app which we build and compile in a 32 bit OS, we then deploy this in a 64 bit Windows 2008 R1 machine which has a 11g 64 bit DB;
when the code make the OCI calls the app terminates.On debugging we found out that its failing to make OCI calls on the connect() method of a .cpp file.
This connect code is a custom wrapper class created for OCI which only accepts a complete SQL statement mainly used for looking after rollback segments, etc.
The code runs perfectly fine when we internally call the ORACMD of sqlplus and directly execute the sql from a script.
It only fails when our code tries to connect to the DB and make OCI calls.
I have also installed a 32 bit Oracle 11g Client 11.1.0.7 since I am using a 32 bit app.
Is there any compatibility issues between these 2 versions or the dll's?
Why is it failing while making OCI calls and is there any resolution?
My machine and setup details:
OS: Windows 2008 R1
DB : Oracle 11g R1 11.1.0.7 (64 bit)
Client: Oracle 11g R1 11.1.0.7 (32 bit)
Our App: 32 bit
ORACLE_HOME = // this is pointing to the 64 bit DB
I tried pointing the oracle_home to the client still no go.
Any suggestions on this will be appreciated.
Regards
Roy

Answer 1

user13376823 wrote:
how do i find that my database is using big file tablespace management or not ?
SQL> select TABLESPACE_NAME,BIGFILE from dba_tablespaces;
TABLESPACE_NAME                BIG
SYSTEM                         NO
UNDOTBS1                       NO
SYSAUX                         NO
USERS                          NO
UNDOTBS2                       NO
TEMP1                          NO
TEMP3                          NO
TEMP2                          NO
8 rows selected.For tablespaces with smallfile datafile maximun datafile size is 32GB, where as bigfile datafile size is 8 exabytes.