RT-11 V5 - Patching the monitor for Remote Console Line

[Obli Viscor]

Hiya guys,

Quick question, I can't find what I'm doing wrong.

I sysgen'd a XM monitor with Multiterminal Support on RT-11 V5.7:
.sh conf

RT-11XM (S) V05.07
Booted from DL0:RT11XM
22 bit addressing is on

USR     is set NOSWAP
EXIT    is set SWAP
KMON    is set NOIND
RUN     is set NOVBGEXE
MODE    is set NOSJ
TT      is set NOQUIET
ERROR   is set ERROR
SL      is set OFF
EDIT    is set KEX
FORTRAN is set FORTRA
KMON nesting depth is 3

CLI is set DCL, CCL, UCL, NO UCF

PDP 11/94 Processor
4088KB of memory
Floating Point Microcode
Extended Instruction Set (EIS)
Memory Management Unit
60 Hertz System Clock

Device I/O time-out support
Multi-terminal support
UNIBUS mapping enabled

Then from AA-M240E-TC - RT-11 System Generation Guide
Section C-4:

Assigning a Remote Line as the Console Terminal
You can customize your FB, XM, and ZM monitors to allow a terminal connected
through a dial-up line to be used as the console terminal. The
multiterminal software
will answer the line when called (provided appropriate modem hardware is in
place)
and connect the remote terminal to the system as the console terminal.
In this customization, monitr.SYS is the name of the multiterminal monitor
file that
you wish to modify, and ..CRMT is the value of that symbol from the monitor
link
map.
.RUN SIPP RET
*monitr.SYS RET
Base? 0 RET
Offset? ..CRMT RET
Base Offset Old New?
000000 ..CRMT 020000 0 RET
000000 ..CRMT+2 xxxxxx
CTRL/Y RET
* CTRL/C
.

So I find from the RT11XM.MAP that .CRMT is offset 144414:

.run sipp
*RT11XM.SYS
Base?    0
Offset?  144414

  Base       Offset      Old  New?
   000000     144414  020000  0
?SIPP-E-Exceeds program limit
Offset?

System Messages Manual states:

"Explanation: The location being examined or modified is beyond the end of
the program.

User Action: SIPP returns with the OFFSET? prompt and does not discard any
previous changes. The current open location is not modified."

But how can that be as the RT11XM.MAP is coming from the most recent SYSGEN?

With kind regards,

Obliviscor