OCI/DLL Not Found(Cannot load OCI DLL:<path to OCI.DLL>)

This problem commonly occurs when customers use a 64-bit Oracle client, which is not supported. Toad requires a 32-bit client.

If you have a 32-bit client, make sure that the Oracle BIN directory is in your system path. This directory will be ORAWIN\BIN, or ORANT\BIN, or something similar.

To check your path, Open a command line window, type PATH, and then press Enter.