A service interface is only compiled and included as part of the deployment package when the target enterprise server is running in the same working mode as the development environment. For example, if you deploy from a Windows 32-bit system to a 64-bit enterprise server, then the service driver program is not compiled and the compiled service driver program is not included in the deployment package. However, the COBOL source for the service driver program is always included in the deployment package, allowing for recompilation on the target server platform.