Download the appropriate Instant Client packages for your platform.Note: Navicat version 10 or below, Navicat only support 32-bit instant client. In TNS mode, Navicat Oracle connects to Oracle server using an alias entry from a tnsnames.ora file. OCI is a library of standard database access and retrieval functions in the form of a dynamic-link library. OCI is an application programming interface that allows an application developer to use a third-generation language's native procedure or function calls to access the Oracle database server and control all phases of SQL statement execution. In Basic mode, Navicat Oracle connects to Oracle through the Oracle Call Interface (OCI). Note: Navicat version 9 or above, instant client is bundled in Navicat. To download Instant Client package (Instant Client Package - Basic), please go to Instant Client package is required for Basic and TNS connection type. What is that and what should I do?Īpply Navicat Product: Navicat for Oracle, Navicat Premium

When I try to establish connection to Oracle server in Navicat, I get an error message saying Instant Client is required.

Navicat 11