In version 11.2 through 12.3, it is possible to create an endless loop in the post process tab; MAX_NESTING_DEPTH is ignored.
As this cannot be done in the pre-process or process tabs which reference the MAX_NESTING_DEPTH, it's expected that the Post Process would work the same way
MAX_NESTING_DEPTH is ignored and an infinite loop is created which can put a strain on regular WP processes
Design issue in 11.2 through 12.3
Release : 12.3
Component : AUTOMATION ENGINE
This has been fixed in version 21.
The fix for this involves a new column in the EH table and new code which could potentially destabilize the product and so is not a practice that Broadcom development will follow.
The possibility to create endless loops in this fashion has been in the product since version 11.2 (it was also technically possible before this by using activate_uc_object to activate an object that activated the one activating it) and can be avoided through scripting best practices in version 12.3 and below.