2239970 - Instance shutdown after ICM restart from SMICM

After restarting ICM from transaction SMICM, the process cannot start due to a shared memory error, such as:

dev_icm:

*** ERROR => ShmCreate: (ATTACH 62, xxxxxxxxxxx) failed 1 [mpixx.c   1190]
...
*** ICM shutdown completed (pid: xxxxxx) ***

or  

*** ERROR => ShmCreate: Invalid size. Key=63 Size=xxxxxx [shmux.c   1435]
...
*** ICM shutdown completed (pid: xxxxxx) ***

or

*** ERROR => DpShMCreate: ShmCreate SHM_DP_CA_KEY(rc=3) [dpxxca.c     143]
...
*** ICM shutdown completed (pid: xxxxxx) ***

or

*** ERROR => Shm Pool Config. Error. PoolKey=22, Key=21. [shmux.c      2063]
...
*** ICM shutdown completed (pid: xxxxxx) ***



As a consequence, the Dispatcher shuts down the instance:

dev_disp:

*** DP_FATAL_ERROR => Internet Communication manager could not be started - I better exit now
*** DISPATCHER EMERGENCY SHUTDOWN ***

SMICM exit soft hard "Internet Communication manager could not be started" ShmCreate shmget IcmShmCreate , KBA , BC-CST-IC , Internet Communication Manager , BC-CST-LL , Low Level Layers , Problem