TOAD OCI.DLL error on Oracle 11g

Posted on 2009-03-31
Last Modified: 2013-12-18
Dear Experts -
I've intalled oracle 11g on Windows Vista 64bit. I've Toad 9.7.x.
I'm getting the following error when i tried to connect to oracle from Toad.
Cannot load OCI DLL: C:\app\st\product\11.1.0\db_1\BIN\oci.dll

Thanks in advance for your time and help.
Question by:sventhan
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Assisted Solution

pinkuray earned 200 total points
ID: 24036764
In Vista you will get the error the best way to use oracle in vista is make a virtual server system and load oracle 11g on you can use any linux or windows OS then use toad or any other tool to access oracle.

Expert Comment

ID: 24044752
I had the same problem. In my case I've installed the Oracle Database 11g for 64 bits and TOAD only works with clients with 32 bits.

To solve this problem install a 32 bit client.

LVL 18

Author Comment

ID: 24045157
thanks experts.
install a 32 bit client of what?

Accepted Solution

fox9106 earned 300 total points
ID: 24048624
Install the Oracle Client 32 bits.

You can download the oracle client 32 bits from this links

Oracle Database 11g Release 1 Client (
for Microsoft Windows (32-bit)


Oracle Database 10g Client Release 2 (


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