The reusable environment is not recommended under IMS. If you do choose
to initiate a reusable environment, then:
- Use a reusable environment only if your application consists of a small
number of different programs. Otherwise, storage will accumulate, diminish,
and eventually bring down the IMS region.
- Preload all programs that receive control from IMS (such as COBOL main
or assembler). If not preloaded, results are unpredictable.
For additional details on using RTEREUS, see Recommended runtime options for non-CICS applications.