Fails to find command.com when started in terminal mode (-t) about dosemu2 HOT 28 CLOSED

@echo off                                                                       
rem autoexec.bat for DOSEMU + FreeDOS                                           
path z:\bin;z:\gnu;z:\dosemu;c:\tc\bin;c:\td                                    
set HELPPATH=z:\help                                                            
set TEMP=c:\tmp                                                                 
blaster                                                                         
prompt $P$G                                                                     
unix -s DOSDRIVE_D                                                              
if "%DOSDRIVE_D%" == "" goto nodrived                                           
lredir d: linux\fs%DOSDRIVE_D%                                                  
:nodrived                                                                       
rem uncomment to load another bitmap font                                       
rem loadhi display con=(vga,437,2)                                              
rem mode con codepage prepare=((850) z:\cpi\ega.cpx)                            
rem mode con codepage select 850                                                
rem ^[chcp 850                                                                  
lredir e: linux\fs/media/cdrom c                                                
unix -s DOSEMU_VERSION                                                          
echo "Welcome to dosemu %DOSEMU_VERSION%!"                                      
unix -e

rem config.sys for DOSEMU + FreeDOS                                             
rem note that the initial "D:" is set to "Z:" at the end                        
SWITCHES=/F                                                                     
DOS=UMB,HIGH                                                                    
dosdata=umb                                                                     
lastdrive=Z                                                                     
files=40                                                                        
stacks=0                                                                        
buffers=10                                                                      
devicehigh=d:\dosemu\ems.sys                                                    
devicehigh=d:\dosemu\cdrom.sys                                                  
install=d:\dosemu\lredir.com z: linux\fs\${DOSEMU_LIB_DIR}/drive_z ro           
shellhigh=d:\command.com /e:1024 /p

ajb@polly:~$ /opt/dosemu2/bin/dosemu -dumb
ALSA lib rawmidi_hw.c:233:(snd_rawmidi_hw_open) open /dev/snd/midiC0D0 failed: No such file or directory


DOSEMU2 2.0pre3-20150728-gc06270e, configured: 2015-07-28 19:47:59 +0100
Please test against a recent version before reporting bugs and problems.
Submit Bugs & Patches to [email protected] or via http://dosemu.org.
FreeDOS kernel build 2036 cvs [version Aug 18 2006 compiled Aug 18 2006]
Kernel compatibility 7.10 - WATCOMC - 80386 CPU required - FAT32 support

(C) Copyright 1995-2006 Pasquale J. Villani and The FreeDOS Project.
All Rights Reserved. This is free software and comes with ABSOLUTELY NO
WARRANTY; you can redistribute it and/or modify it under the terms of the
GNU General Public License as published by the Free Software Foundation;
either version 2, or (at your option) any later version.
C: HD1, Pri[ 1], CHS=    0-1-1, start=     0 MB, size=  2000 MB
D: HD2, Pri[ 1], CHS=    0-1-1, start=     0 MB, size=  2000 MB
UMB's unavailable!                                                             
dosemu XMS 3.0 driver installed.
dosemu EMS driver rev 0.5 installed.
[dosemu cdrom driver installed (V0.2)]
Kernel: allocated 41 Diskbuffers = 21812 Bytes in HMA
Z: = LINUX\FS\ attrib = READ ONLY

FreeCom version 0.84-pre2 XMS_Swap [Aug 28 2006 00:29:00]
Sound on: SB at 0x220-0x22f, IRQ=5, DMA8=1, DMA16=5. MPU-401 at 0x330-0x331.
Redirection for drive D: was deleted.
D: = LINUX\FS/HOME/AJB attrib = READ/WRITE
Error 35 (network name not found)
while redirecting drive E: to LINUX\FS/MEDIA/CDROM
"Welcome to dosemu 2.0pre3-20150728-gc06270e!"
C:\>

 ERROR: You do not have the DISPLAY variable set, but want to run DOSEMU
in its own X-window. Set the DISPLAY variable such as

    DISPLAY=:0.0; export DISPLAY

if running X locally or

    DISPLAY=host:0.0; export DISPLAY

when running remotely ('host' being the machine where you are typing at)

After this run xdosemu again.
Segmentation fault (core dumped)

ERROR: SDL init: Failed to connect to the Mir Server
ALSA lib rawmidi_hw.c:233:(snd_rawmidi_hw_open) open /dev/snd/midiC0D0 failed: No such file or directory
ERROR: Unable to open console or check with X to evaluate the keyboard map.
Please specify your keyboard map explicitly via the $_layout option.
Press ENTER to continue with DOS programs thinking that they use a US layout or
Ctrl-C to exit.

$ /opt/dosemu2/bin/dosemu -X
ERROR: You do not have the DISPLAY variable set, but want to run DOSEMU
in its own X-window. Set the DISPLAY variable such as

    DISPLAY=:0.0; export DISPLAY

if running X locally or

    DISPLAY=host:0.0; export DISPLAY

when running remotely ('host' being the machine where you are typing at)

After this run xdosemu again.
Segmentation fault (core dumped)

$_umb_a0 = (on)
$_ems_frame = (0xe400)

$_umb_a0 = (on)
$_ems = (off)