CPLEX Runtime Development and Licensing Procedures
ILOG CPLEX uses the standard ILOG License Manager (ILM). The ILOG License Manager online documentation, which comes with your software distribution, describes ILM access keys (or keys, for short) in more detail. This section describes how to write applications that use ILM runtime access keys.
An ILOG CPLEX runtime license costs significantly less money than a regular development license. However, its usage is restricted to applications created by a particular developer or company. In order to distinguish runtime access keys from development keys (as well as runtime keys for applications created by other companies), you need to call an additional routine in your source code before initializing the CPLEX environment.