Urgent help with ORA-01062: unable to allocate memory for define buffer

Question

Hello, Folks!
I have a c++ code that is using OCI API that is running both in
windows and in spark.
(The same c++ code compiled and running in both platforms)
and asking the same query.
In windows, everything is OK but in spark
it failes...
The ORACLE Server is installed on win2003 station
Both client and server ORACLE version is 10.2.0.1.0
The code is running on spark(oracle instant client is installed)
This query is a simple select query that selects only one field
of type VARCHAR2(4000) (the same problem with happen with any
string type field larger than 150 characters)
The error occured when calling for OCIDefineByPos method
when associating an item in a select-list with the type and output
data buffer.
The error message is: ORA-01062: unable to allocate memory for define
buffer
(This error message signifies that I need to use piecewise operation...)
But it happens even if I make this varchar2 field to be of size larger
than 150.
It is not fair to use piecewise fetch for such a small fields sizes.
May be there is not configuration setting that can enlarge this
I know that I wrote here a very superficial description.
If somebody knows something about this issue, please help
Thanks

Answer 1

I had a special luck today after searching the solution per weeks:)I have got a solution.
When I get the size of the oci field, in the following expressioin
l_nResult = OCIAttrGet(l_oParam->pOCIHandle(), OCI_DTYPE_PARAM, &(orFieldMD.m_nSize), NULL, OCI_ATTR_DATA_SIZE, m_oOCIErrInfo.pOCIError());
orFieldMD.m_nSize was of type ub4 but according the manual it must be ub2.
As a result, the number returned was very large (junk?) and I passed this value to OCIDefineByPos
Now I changed the type and everything is working!!!
In windows there is not problem with this expression :)
Thanks
Issahar