The assembler user exit (CEEBXITA), HLL user exit (CEEBINT), and
programmer defaults (CEEUOPT) that are used to initialize the environment
are taken from the main routine being called through (call_main).
If a program in the PreInit table failed to load (return code
8), the (identify_attributes) CEEPIPI function can be used to help
determine what table entry address did not resolve.
If the process ID needs to be the same for all programs called
by (call_main), the preinitialization driver program should pre-dub
the task (TCB) before performing (init_main_dp).
MSGFILE output can be directed to either a spool or to a unique
file.
Language Environment resources are not shared across multiple environments.
C memory files are not shared across multiple environments.
Calling POSIX(ON) programs in an (init_main_dp) environment is
not supported.