error -22 on migrate

what can be the problem when a process don't succeed to migrate to 
another node (on FC2 2.4.22-1.2199.nptl_ssi_9smp)

looking in /proc/cluster/loadlog      i see an error -22

is that a well known error? what does it means?
thanks

ML

1177436262 mig   :pid 197795(sim_real_seek) -> node 4 mem 49936 my load 
41 node4 load 3
1177436262 migrate pid 197795(sim_real_seek) failed to node 4 error -22
1177436585 mig   :pid 197795(sim_real_seek) -> node 4 mem 49444 my load 
41 node4 load 3
1177436585 migrate pid 197795(sim_real_seek) failed to node 4 error -22
1177436622 mig   :pid 197795(sim_real_seek) -> node 4 mem 49280 my load 
41 node4 load 3
1177436622 migrate pid 197795(sim_real_seek) failed to node 4 error -22

-- 
      Maurice Libes
Tel : +33 (04) 91 82 93 25            Centre d'Oceanologie de Marseille
Fax : +33 (04) 91 82 93 03            UMS2196CNRS- Campus de Luminy, 
Case 901
                                       F-13288 Marseille cedex 9

Veuillez noter ma nouvelle adresse ==> [email protected]

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