Cannot find OCI DLL : oci.dll

Toad for Oracle
1

Hi All,

While trying to access Oracle with TOAD by using Direct method, getting error as “Cannot find OCI DLL : oci.dll”. Please help me on to resolve the issue.

2

In short:
If you have a 32 bit Toad, you need a 32 bit Oracle client.
If you have a 64 bit Toad, you need a 64 bit Oracle client.

It's usually OK to have multiple Oracle clients installed, but occasionally they clash. So if you have problems, you may want to install all of them, and then reinstall only what you need. The following link has tips on that process.

In short:
If you have a 32 bit Toad, you need a 32 bit Oracle client.
If you have a 64 bit Toad, you need a 64 bit Oracle client.
It's usually OK to have multiple Oracle clients installed, but occasionally they clash. So if you have problems, you may want to install all of them, and then reinstall only what you need

There are some tips on how to do that here: