Failure: _EXECARRAY

#1
Help topic _EXECARRAY states: "_EXECARRAY returns the number of array elements assigned by the last @EXECARRAY function." Unfortunately it returns an empty string in both 12.01.44 and 12.10.67. WinXP home SP3.
 
#2
Help topic _EXECARRAY states: "_EXECARRAY returns the number of array elements assigned by the last @EXECARRAY function." Unfortunately it returns an empty string in both 12.01.44 and 12.10.67. WinXP home SP3.
Reproduced:

Code:
v:\> setarray env[100]

v:\> echo %@execarray[env,set /x]
0

v:\> echo %_execarray
ECHO is OFF

v:\>