TID: Mystic BBS 1.12 A43
MSGID: 1:275/201.1 dc949e1b
TZUTC: 0000
I using the current version of Mystic and debuian9 and when I try and run a
door I am getting this

Command -> S
Note that DOS needs 25 lines. You might want to enlarge your
window before continuing.

Now type ENTER to start DOSEMU or C to cancel
                                                        

Here is the menu data I am using:

dosemu -I"serial { com 1 virtual }" "/mystic/doors/stackem/stackem.bat" %3
/DOS

--- Mystic BBS v1.12 A43 2019/03/02 (Linux/64)
 * Origin: Mystic.dynu.net 2025 (1:275/201.1)
SEEN-BY: 1/123 15/0 2 16/101 19/33 35 36 38 50 20/4609 34/999 90/1
SEEN-BY: 103/705 104/57 106/201 324 116/18 120/331 123/140 124/5014
SEEN-BY: 124/5016 5018 128/2 130/803 153/757 7715 154/10 203/0 218/700
SEEN-BY: 221/0 222/2 227/114 229/275 354 426 452 616 981 1014 230/150
SEEN-BY: 230/152 240/1120 5832 249/206 317 400 250/1 261/38 100 266/512
SEEN-BY: 267/155 275/0 89 90 91 98 100 101 201 280/464 5003 282/1031
SEEN-BY: 282/1056 291/1 111 292/854 310/31 317/3 320/119 219 322/757
SEEN-BY: 340/400 342/13 200 387/26 396/45 423/120 633/280 712/848
SEEN-BY: 770/1 801/161 189 2320/105 2452/250 3634/12 5020/715 1042
PATH: 275/201 100 261/38 396/45 280/464 229/426