what does this cygserver error mean?

[bob 295]

I'm getting this error associated with shared memory and cygserver (sender is 
the name of my process setting and loading the shared memory):

======== begin error snip ========
3 [main] sender 3684 transport_layer_pipes::connect: lost connection to 
cygserver,  error = 2
======== end error snip =========

Could someone point me to a place where this error is described?   Thanks.

bob

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