Requirements

Two versions of ODAC cannot be installed in parallel for the same IDE, and, since the Devart Data Access Components products have some shared bpl files, newer versions of ODAC may be incompatible with older versions of other Devart Data Access Components products.

So, before installing a new version of ODAC, uninstall any previous version of ODAC you may have, and check if your new install is compatible with other Devart Data Access Components products you have installed. For more information please see Using several products in one IDE. If you run into problems or have any compatibility questions, please email [email protected]

Note: You can avoid performing ODAC uninstallation manually when upgrading to a new version by directing the ODAC installation program to overwrite previous versions. To do this, execute the installation program from the command line with a /force parameter (Start | Run and type odacXX.exe /force, specifying the full path to the appropriate version of the installation program).

When installing ODAC from the sources to Windows Vista or Windows 7, it is necessary to have full access to the ODAC folder.

To use full set of Oracle features you have to have Oracle client software installed. If you do not want to install it, you can use Direct mode, in which ODAC communicates with Oracle server without intermediate libraries. In order to use the Direct mode, the operating system must have TCP/IP protocol support installed. For more information about using Direct mode, refer to Connecting in Direct mode article.

ODAC supports both 32-bit and 64-bit Oracle client versions in OCI mode. Developing applications for 64-bit client is possible only in RadStudio XE2 and Lazarus (FPC).

Note: RadStudio XE2 is a 32-bit application, therefore, for connecting to Oracle in OCI mode, even on a 64-bit platform, the 32-bit Oracle client is needed to be installed.

ODAC supports work with Oracle Instant Client in OCI mode. For correct work with Instant Client, the data about the client must be recorded to the registry or the Path environment variable, or Instant Client files(including tnsnames.ora) must be located in the application directory.