Class not registered when connecting to the Express Edition


On my laptop I was able to install the 11.2.0.2.1 XE and Developer SQL 4.0.1.

TNSNAMES. ORA is properly configured, the SQLPlus and SQL Developer therefore have access to the database, I can create tablespaces, users, tables, etc. SQLDeveloper connects using the TNSNAMES file. ORA.

XE =
(DESCRIPTION =
(ADDRESS = (PROTOCOL = TCP) (HOST = PORTLEKU)(PORT = 1521))
(CONNECT_DATA =
(SERVER = DEDICATED)
(SERVICE_NAME = XE)
)
)

FITTING_SERVICE =
(DESCRIPTION =
(ADDRESS = (PROTOCOL = TCP) (HOST = PORTLEKU)(PORT = 1521))
(CONNECT_DATA =
(SERVER = DEDICATED)
(SERVICE_NAME = XE)
)
)

However, when I run my application program, "Fitting.EXE", it gives me a 'Class not registered' error message when I run Connection.DoConnect.

The connection string is configured to connect through OLE DB, use Fitting_Service as data source. This is known to work, such that the program works correctly on my desktop PC that is running Oracle 10 g with OLE DB and is used to compile and link the executable file (the laptop has no software development).

My first thoughts on this problem are:

(1) I need ODAC on the laptop. But that creates a new home of the Oracle, is not?  So if I set up the TNSNAMES file. ORA in this new folder tree, how it can reach the server database on the same PC, a server that already has a listener configured and known to work as SQLDeveloper can see the database. There is already a TNSNAMES file. ORA files in the tree of files server and properly configured. If I install a new listener, don't he substitute somehow the existing one, may break the connection that uses SQLDeveloper?

(2) the program Fitting.EXE has been linked on a system with 10 g and the corresponding OLE DB software. Perhaps it is impossible to connect to an 11g database, either by an OLE DB 11g if I install it to ODAC 11.2.0.2.1? I have not yet tried ODAC installation because I was afraid to disturb something that works - see already 1) above.

As you can probably guess, I'm a little lost on this and need someone to point me in the right direction instead of groping in the dark.

--

JF

Success, finally!

Take your index on copying tnsnames alias in the client tnsnames file, I installed ODAC112021 and did just that. It works amazingly!

Problem solved. Thank you.

Plomong

Tags: Database

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