To configure Instant Client Light, you must make it the default instead of Instant Client.

1. In the ORACLE_BASE\ORACLE_CLIENT_HOME directory, either rename or delete the oraociei12.dll file.

   The oraociei12.dll file is the main binary for Instant Client.

2. From the ORACLE_BASE\ORACLE_CLIENT_HOME\install\instantclient\light directory, copy the oraociicus12.dll file to the ORACLE_BASE\ORACLE_CLIENT_HOME directory. .

   The oraociicus12.dll file is the binary for Instant Client Light.

3. Ensure that the PATH environment variable points to the ORACLE_BASE\ORACLE_CLIENT_HOME directory.

   Note:

   If the Instant Client PATH is not set, then the applications attempt to load the regular Instant Client libraries first. If the applications cannot find these, then they attempt to load the Instant Client Light library next.