Format Change in the ^mtemp and ^ERRORS Globals

InterSystems has several routines, methods and utilities that can create stack dumps.  Stack dumps are created in the ^mtemp(index) global by the %SYS.ProcessQuery:ExamStackByPid(.) classmethod as well as by some undocumented legacy entry points of the ^%STACK utility.  Stack dumps can also be created in the ^ERRORS(date,index) global by the ^%ETN trap routine, including additional entry points BACK^%ETN, LOG^%ETN, ^%ET and the Log() method of exception objects.

$LIST string format and %DynamicArray and %DynamicObject classes

IRIS, and previously Cache, contain several different ways to create a sequence containing a mixture of data values.  A data sequence that has been available for many years is the $LIST string.  Another more recent data sequence is the %DynamicArray class, which along with the %DynamicObject class, is part of the IRIS support for JSON string representation.  These two sequences involve very different tradeoffs.