Problems with MFC AddNew

Hello,

I'm having some difficulty with adding new records using the ODBC driver
with MFC. This is only occurring is certain situations...

I created a simple table:

CREATE TABLE project (project_id INT PRIMARY KEY);

Using Visual Studio C++ I created a CRecordset class (CProject) to
exchange data with the project table. I then execute the following code:

CDatabase database;
database.OpenEx(_T("DSN=PostgreSQL30"));
CProject project(&database);
project.Open();
project.AddNew();
project.m_project_id = 1;
project.Update();

I get an Access Violation on the Update(). The log file shows the
following error:

psqlodbc_3100.log:
conn=01104290, query='SELECT "project_id" , "ctid", "project_id" FROM
"public"."project"'
[ fetched 0 rows ]

mylog_3100.log:
[1800-4.186]extend_putdata_info: entering ... self=016C5EC4,
parameters_allocated=0, num_params=1
[1800-4.191]extend_putdata_info: unable to create 1 new pdata from 0 old
pdata

Now I've been able to get the Update() to work in the following situations:

- remove the primary key:
CREATE TABLE project (project_id INT);

- change the int to bigint:
CREATE TABLE project (project_id BIGINT PRIMARY KEY);

- make sure at least one record exists in the table:
CREATE TABLE project (project_id INT PRIMARY KEY);
INSERT INTO project (project_id) VALUES (2);

So what's going on? I would like to use int, but if I have to I can
switch to bigint. Thanks for your help.

Ian