Source code for a transactions on Unix® extended for distributed operation (Tuxedo®) application, is parsed by an application migration module. At least one application service routine that each specifies a Tuxedo® service within the parsed source code is identified. At least one identified application service routine includes at least one associated application-to-transaction manager (ATMI) application programming interface (API) routine. Stub code that includes an invocation call for an associated customer information control system service for each application service routine identified within the source code is generated. A customer information control system environment executable is created based upon the source code, the stub code, glue code, and a migration library. The migration library includes, for each associated ATMI API routine, a mapping routine that processes data format differences between each ATMI API routine and at least one associated customer information control system API routine.