The OS PL/I PLICALLA entry point is supported under Language Environment; however, it is not a recommended interface for IMS and support can be withdrawn at any time. Instead use the SYSTEM(IMS) compile-time option and the PLISTART or CEESTART entry point.
Language Environment provides the same support for OS PL/I PLICALLA applications; however, if you recompile your main load module with PL/I for MVS & VM and want to continue to use PLICALLA, you must follow additional rules. See PLICALLA Considerations for details.