Adventure in Ersatz-11

Hi all. I have a problem when I try to run Advent in Ersatz-11. I guess it is trivial, but I am in the learning phase... Running RT-11, when entering "run advent", I get the response: ?KMON-F-Insufficient memory. For information here are some screen "dumps" of entered commands. .SH MEM ------- Extended Memory ------- Address Module Words Type ------- ------ ----- ---- 17760000 IOPAGE 4096. HDW 00760000 MEMTOP 00166200 ...... 96704. 00160000 SL 1600. PVT ------ Low Memory ------- Address Module Words ------- ------ ----- 155434 DL 626. 122216 RMON 6983. 111154 USR 2321. 001000 ..BG.. 18486. .SHOW CONF RT-11XM (S) V05.03 Booted from DL0:RT11XM USR is set NOSWAP EXIT is set SWAP KMON is set NOIND TT is set NOQUIET ERROR is set ERROR SL is set OFF EDIT is set KEX KMON nesting depth is 3 Global .SCCA flag is disabled PDP 11/35,40 Processor 248KB of memory Extended Instruction Set (EIS) Memory Management Unit 50 Cycle System Clock Device I/O time-out support FPU support