connection problem with ecpg

Hi,

I have been using EPCG since 6.3.2 with no problems. I am extending some
code written in my 6.3.2 days which is now targeting a newly built 6.4.
I now have a problem connecting to my database.

The command:
    exec sql CONNECT 'my_db';

give out the following error during runtime:

    connect: could not open database NULL.

Has the syntaxt changed in anyway or could it be a setup problem.

Any help would be greatly aprreciated.

Regards

Lincoln Spiteri
(STMicroelectronics, Malta)