Contiki 6lbr router produces not enough memory error -

I get an error when running 6lBR in router mode on openlote error: NODE: to create node Not enough memory [node ipv 6 acer] . I am not getting any error in any source file and so it is difficult to see why this can happen! Has anyone seen this error before or how to solve it?

I run the router with the RDC: contikimac_driver and MAC: csma_driver

  Memory Flash: 86990 (16%) Code: 84781 is introduced: router webpage The information about me tells me:   
 Data: 2209 RAM: 29429 (89%)  

and routing tables with four of my four motors:

Route [Dell] Aha: 212: 4b00: 60d: 9b57 / 128 via fe80: 212: 4b 00: 60d: 9 cas 7668s [dl] AAAA: : 212: 4b 00: 60d: 9b-59 / 128fael :: 212: 4b 00: 60d: 9 cas 765 9s [del] aaaa :: 212: 4b 00: 60d9b Vi / 128 fe80 :: 212: 4b00: 60d: 9 apple 7600s [dl] aAA :: 212: 4b 00: 60d: 9c3/128 fe80 :: 212: 4b 00: 60 D: 9ccr 7586s