Error OBJECTS_OBJREF_NOT_ASSIGNED_NO when i try to run HRXSS_PER_...

Question

Hi.
I have the same problem as in this post:
[/thread/1630971 [original link is broken]|/thread/1630971 [original link is broken]]
I need to maintain the infotype 23 through the portal. This infotype is only maintenance from the Portal for Australia. if I try to run the function HRXSS_PER_READ_P0023_AU, I only get the error below.
I get the same error if I try to run the other functions of module HRXSS_PER_P0023_AU, or if
I try to run others Spanish modules how HRXSS_PER_READ_P0002_ES. With ESS, the infotype 2 is working properly. Ess, don't call these same functions?
OBJECTS_OBJREF_NOT_ASSIGNED_NO
CX_SY_REF_IS_INITIAL
Access via 'NULL' object reference not possible.
An exception occurred that is explained in detail below.
The exception, which is assigned to class 'CX_SY_REF_IS_INITIAL', was not
caught in
procedure "HRXSS_PER_CLEANUP" "(FUNCTION)", nor was it propagated by a RAISING
clause.
Since the caller of the procedure could not have anticipated that the
exception would occur, the current program is terminated.
The reason for the exception is:
You attempted to use a 'NULL' object reference (points to 'nothing')
access a component.
An object reference must point to an object (an instance of a class)
before it can be used to access components.
Either the reference was never set or it was set to 'NULL' using the
CLEAR statement.

Answer 1

ESS calls the same function HRXSS_PER_READ_P0002_ES.
but you cant execute through there
for ESS checking in backend you need to use trans code PUIT_UI