04 May 16 07:54, you wrote to all:

 SH>   However the Telnet door is proving to be a challange (and that's the
 SH> one I want so I can join BBSLink and be done with door game
 SH> maintance).

i've been using both bbslink.exe and telnetdoor.exe for sometime, both are in 
different folders \doors\bbslink\bbslink.exe size 11,264 date 04/01/2015
RMLib.dll size 189,440 date 03/14/2015  it only shows an error.log that output
System.Exception: Usage
   at RandM.RMLib.RMDoor.DefaultOnUsage()
   at RandM.RMLib.RMDoor.Startup()
   at RandM.RMLib.RMDoor..ctor()
   at ArchaicBinary.BBSlink.Program.Main(String[] args)
my run batch looks like Echo on
set host=(games.bbslink.net)
set syscode=(fluph)
set authcode=(xxxxxxxxxxxx)
set schemecode=(xxxxxxxxxxx)
bbslink.exe -W%host% -X%syscode% -Y%authcode% -Z%schemecode%
set host=
set syscode=
set authcode=
set schemecode=

 SH>   I've made sure the RMLib is the current version and there is only
 SH> one of them on my system, when attempting to launch it via the
 SH> commandline "TelnetDoor -L" (To test in local mode) the
program closes
 SH> and creates an "Ex.log" in the current directory:

My \doors\CBnet\telnetdoor.exe size 11,246 date 10/13/2015 is only used for 
combatnet league 441 and it has ex.log showing an output.. showing
System.Exception: Idle Time Limit Exceeded
   at RandM.RMLib.RMDoor.DefaultOnTimeOut()
   at RandM.RMLib.RMDoor.DoEvents()
   at RandM.RMLib.RMDoor.KeyPressed()
   at RandM.TelnetDoor.Program.Connect()
   at RandM.TelnetDoor.Program.Main(String[] args)

The RMLib.dll size 197,632 date 10/13/15   also my mystic stuff shows
REM:  Mystic BBS Menu Entry Sample:
REM:  =============================
REM:          Menu (doors): Command #
REM:  Command: (D3) Exec door (door32.sys)
REM   Data:    c:\doors\combatnet\cbn.bat %P %U

and the cmb batch command line uses ...
REM Change to the directory were this file & TelnetDoor are installed ie:
CD C:\DOORS\CBnet
REM Your BBS ID:
set BBSNAME=XXXXXX
REM Your BBS ATHORIZATION PASSCODE:
set PASSCODE=XXXXXXX
REM mark: At this time only DOOR32.SYS Capable systems are supported.
set DROPTYPE=DOOR32.SYS
REM    --- Pleae do not edit below this line ----
set SERVER=server.name.net
set PORT=XXXX
set DROPFILE=%1%DROPTYPE%
TelnetDoor -D%DROPFILE% -R -S%SERVER% -P%PORT% -Y%BBSNAME%%2 -X%PASSCODE%
:end

 SH> Any ideas where I've gone wrong?  This is on Windows XP 32 bit.

Both the bbslink.exe and the telnetdoor.exe work great over here in WINXP SP3.
Not really sure why your is having issues tiny. I do think the both are the 
same program using the same RMlib maybe someone just renamed telnetdoor to 
bbslink plus i thing mine are different version builds of the same software.

--- GoldED+/W32-MSVC 1.1.5-b20160201