On May 31, 2010, at 5:10 AM, Sylvain Jeaugey wrote:

> In my case, the error happens in :
>    mca_btl_openib_add_procs()
>      mca_btl_openib_size_queues()
>        adjust_cq()
>          ibv_create_cq_compat()
>            ibv_create_cq()

Can you nail this down any further?  If I modify adjust_cq() to always return 
OMPI_ERROR, I see the openib BTL fail over properly to the TCP BTL.

-- 
Jeff Squyres
jsquy...@cisco.com
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