Post core dumps with "Can't find object id in cache.Reload object cache actid" (46991)

Post core dumps with the following error in the poster log (*OPO* LOG).

"Can't find object id <object id> in cache.Reload object cache actid <actid>
Will reconcile objcache for actid=<actid> "

When post process  starts it loads the object cache of the first message in the queue.
The message on which core dump occurs has a new actid.

Whenever poster encounters an activation message it reloads the new object cache.  
If there is any situation where activation messages are missed from the queue, poster continues to read the old object cache.  
In the new object cache has information where the new objects are added to the configuration or the object definitions have changed
and if poster is reading old object cache for the messages associated with new object cache, post core dump occurs

Workaround:

1) From the post debug logs find out the actid of the first message.
Here is the debug setting to use to collect the logs
sp_ctrl>set param SP_OPO_DEBUG_FLAG 0x0f0001ff
2) Save the corresponding poster object cache
3) Copy the latest object cache from the source  to the object cache from step 2 . Refer to SOL2459 for steps to copy the object cache.
4) Start post

Call Shareplex Technical Support if the above does not help.